From 2ff27e45011b8bcf31ef566ae84c1c923c8aea69 Mon Sep 17 00:00:00 2001
From: turkins <kirils.turkins@adesso.de>
Date: Mon, 26 Oct 2026 21:32:07 +0100
Subject: [PATCH] fix(security): patch runtime and build dependencies and
 rebuild bundles

---
 dist/restore-only/index.js | 1371 +++++++++++++++++++++++++++---------
 dist/restore/index.js      | 1371 +++++++++++++++++++++++++++---------
 dist/save-only/index.js    | 1371 +++++++++++++++++++++++++++---------
 dist/save/index.js         | 1371 +++++++++++++++++++++++++++---------
 package-lock.json          |  290 ++++----
 package.json               |   12 +
 6 files changed, 4369 insertions(+), 1417 deletions(-)

diff --git a/dist/restore-only/index.js b/dist/restore-only/index.js
index bd24321..9764560 100644
--- a/dist/restore-only/index.js
+++ b/dist/restore-only/index.js
@@ -8001,6 +8001,40 @@ var escClose = '\0CLOSE'+Math.random()+'\0';
 var escComma = '\0COMMA'+Math.random()+'\0';
 var escPeriod = '\0PERIOD'+Math.random()+'\0';
 
+var EXPANSION_MAX = 100000
+
+// `EXPANSION_MAX` caps the *number* of expansions, but not their length. An
+// input like `'{a,b}'.repeat(1500)` stays under that count - its output is
+// truncated to 100k results - while making every result ~1500 characters
+// long. The result set, and the intermediate arrays built while combining
+// brace sets, then grow large enough to exhaust memory and crash the process
+// (CVE-2026-14257). `EXPANSION_MAX_LENGTH` bounds the total number of
+// characters the accumulator may hold at any point, so memory stays flat no
+// matter how many brace groups are chained. The limit sits well above any
+// realistic expansion (100k results hitting `EXPANSION_MAX` measure ~1M
+// characters) so legitimate input is unaffected.
+var EXPANSION_MAX_LENGTH = 4000000
+
+// `expand` recurses once per level of brace *nesting* - both when expanding a
+// set's comma members and when re-wrapping a set whose body is a single part.
+// The CVE-2026-14257 fix made the *tail* iterative (recursion on `m.post`, one
+// level per chained group), which left nesting depth unbounded: about 3,100
+// levels of `{{{...a,b...}}}` - only ~6KB of input - exhausted the native stack
+// and crashed the process. `EXPANSION_MAX_DEPTH` bounds how deep the parser
+// will follow nesting. It sits far above any realistic pattern and well below
+// the depth at which the stack runs out.
+var EXPANSION_MAX_DEPTH = 1000
+
+// Bash keeps a quirk where a brace group followed by a comma set still expands
+// (`{a},b}`). The parser implements it by rewriting the string and restarting
+// the scan, absorbing one `}` per pass. `n` trailing braces therefore cost `n`
+// full passes over a string that itself grows by one `escClose` sentinel each
+// time - quadratic in `n`, with a ~26x constant from the sentinel's length.
+// 128KB of `'{a}' + '}'.repeat(n) + ',z}'` blocked the event loop for 27
+// seconds to produce two results. `EXPANSION_MAX_REWRITES` bounds how many
+// times the scan may restart. Real `{a},b}` input needs a handful.
+var EXPANSION_MAX_REWRITES = 1000
+
 function numeric(str) {
   return parseInt(str, 10) == str
     ? parseInt(str, 10)
@@ -8024,40 +8058,66 @@ function unescapeBraces(str) {
 }
 
 
+// Like `target.push(...items)` but doesn't overflow the stack
+function pushAll(target, items) {
+  for (var i = 0; i < items.length; i++) {
+    target.push(items[i]);
+  }
+}
+
 // Basically just str.split(","), but handling cases
 // where we have nested braced sections, which should be
 // treated as individual members, like {a,{b,c},d}
 function parseCommaParts(str) {
-  if (!str)
-    return [''];
-
   var parts = [];
-  var m = balanced('{', '}', str);
 
-  if (!m)
-    return str.split(',');
+  // Walk the brace groups iteratively. Recursing on `post` once per group let a
+  // chain of them exhaust the stack - the parsing-side counterpart to
+  // the `expand` overflow fixed for CVE-2026-14257, and not something `max` or
+  // `maxLength` can bound, since it happens before expansion.
+  //
+  // The part the next chunk continues
+  var carry = '';
 
-  var pre = m.pre;
-  var body = m.body;
-  var post = m.post;
-  var p = pre.split(',');
+  for (;;) {
+    var m = balanced('{', '}', str);
 
-  p[p.length-1] += '{' + body + '}';
-  var postParts = parseCommaParts(post);
-  if (post.length) {
-    p[p.length-1] += postParts.shift();
-    p.push.apply(p, postParts);
-  }
+    if (!m) {
+      var tail = str.split(',');
+      tail[0] = carry + tail[0];
+      pushAll(parts, tail);
+      return parts;
+    }
 
-  parts.push.apply(parts, p);
+    var pre = m.pre;
+    var body = m.body;
+    var post = m.post;
+    var p = pre.split(',');
+
+    p[0] = carry + p[0];
+    p[p.length-1] += '{' + body + '}';
+
+    if (!post.length) {
+      pushAll(parts, p);
+      return parts;
+    }
 
-  return parts;
+    carry = p.pop();
+    pushAll(parts, p);
+    str = post;
+  }
 }
 
-function expandTop(str) {
+function expandTop(str, options) {
   if (!str)
     return [];
 
+  options = options || {};
+  var max = options.max == null ? EXPANSION_MAX : options.max;
+  var maxLength = options.maxLength == null ? EXPANSION_MAX_LENGTH : options.maxLength;
+  var maxDepth = options.maxDepth == null ? EXPANSION_MAX_DEPTH : options.maxDepth;
+  var maxRewrites = options.maxRewrites == null ? EXPANSION_MAX_REWRITES : options.maxRewrites;
+
   // I don't know why Bash 4.3 does this, but it does.
   // Anything starting with {} will have the first two bytes preserved
   // but *only* at the top level, so {},a}b will not expand to anything,
@@ -8068,7 +8128,7 @@ function expandTop(str) {
     str = '\\{\\}' + str.substr(2);
   }
 
-  return expand(escapeBraces(str), true).map(unescapeBraces);
+  return expand(escapeBraces(str), max, maxLength, maxDepth, 0, maxRewrites, true).map(unescapeBraces);
 }
 
 function identity(e) {
@@ -8089,110 +8149,287 @@ function gte(i, y) {
   return i >= y;
 }
 
-function expand(str, isTop) {
-  var expansions = [];
-
-  var m = balanced('{', '}', str);
-  if (!m || /\$$/.test(m.pre)) return [str];
-
-  var isNumericSequence = /^-?\d+\.\.-?\d+(?:\.\.-?\d+)?$/.test(m.body);
-  var isAlphaSequence = /^[a-zA-Z]\.\.[a-zA-Z](?:\.\.-?\d+)?$/.test(m.body);
-  var isSequence = isNumericSequence || isAlphaSequence;
-  var isOptions = m.body.indexOf(',') >= 0;
-  if (!isSequence && !isOptions) {
-    // {a},b}
-    if (m.post.match(/,(?!,).*\}/)) {
-      str = m.pre + '{' + m.body + escClose + m.post;
-      return expand(str);
+// Build `{ acc[a] + pre + values[v] }` for every combination, capping the
+// number of results at `max` and the total number of characters at `maxLength`.
+// This is the one place output grows, so bounding it here keeps the single
+// accumulator - and therefore memory - flat regardless of how many brace groups
+// are combined (CVE-2026-14257).
+//
+// `base[a]` is the length of the part of `acc[a]` that predates the current
+// empty-drop baseline (see `expand`). The matching baselines for the results
+// are appended to `outBase`, which the caller carries forward alongside them.
+function combine(
+  acc,
+  base,
+  pre,
+  values,
+  max,
+  maxLength,
+  dropEmpties,
+  outBase
+) {
+  var out = []
+  var length = 0
+  for (var a = 0; a < acc.length; a++) {
+    for (var v = 0; v < values.length; v++) {
+      if (out.length >= max) return out
+      var expansion = acc[a] + pre + values[v]
+      // Bash drops empty results at the top level. Skip them before they count
+      // against `max`, so `max` bounds the number of *kept* results. "Empty"
+      // means "adds nothing past the baseline", not "empty overall".
+      if (dropEmpties && expansion.length === base[a]) continue
+      if (length + expansion.length > maxLength) return out
+      out.push(expansion)
+      outBase.push(base[a])
+      length += expansion.length
     }
-    return [str];
   }
+  return out
+}
 
-  var n;
-  if (isSequence) {
-    n = m.body.split(/\.\./);
-  } else {
-    n = parseCommaParts(m.body);
-    if (n.length === 1) {
-      // x{{a,b}}y ==> x{a}y x{b}y
-      n = expand(n[0], false).map(embrace);
-      if (n.length === 1) {
-        var post = m.post.length
-          ? expand(m.post, false)
-          : [''];
-        return post.map(function(p) {
-          return m.pre + n[0] + p;
-        });
+// The expansion values of a single numeric (`1..5`) or alphabetic (`a..e..2`)
+// sequence body.
+function expandSequence(
+  body,
+  isAlphaSequence,
+  max,
+  maxLength
+) {
+  var n = body.split(/\.\./)
+  var N = []
+  // A sequence body always splits into two or three parts, but the compiler
+  // can't know that.
+  /* c8 ignore start */
+  if (n[0] === undefined || n[1] === undefined) {
+    return N
+  }
+  /* c8 ignore stop */
+  var x = numeric(n[0])
+  var y = numeric(n[1])
+  var width = Math.max(n[0].length, n[1].length)
+  var incr =
+    n.length === 3 && n[2] !== undefined ?
+      Math.max(Math.abs(numeric(n[2])), 1)
+    : 1
+  var test = lte
+  var reverse = y < x
+  if (reverse) {
+    incr *= -1
+    test = gte
+  }
+  var pad = n.some(isPadded)
+
+  var length = 0
+  for (var i = x; test(i, y) && N.length < max; i += incr) {
+    var c
+    if (isAlphaSequence) {
+      c = String.fromCharCode(i)
+      if (c === '\\') {
+        c = ''
+      }
+    } else {
+      c = String(i)
+      if (pad) {
+        var need = width - c.length
+        if (need > 0) {
+          var z = new Array(need + 1).join('0')
+          if (i < 0) {
+            c = '-' + z + c.slice(1)
+          } else {
+            c = z + c
+          }
+        }
       }
     }
+    if (length + c.length > maxLength) break
+    N.push(c)
+    length += c.length
   }
+  return N
+}
 
-  // at this point, n is the parts, and we know it's not a comma set
-  // with a single entry.
+function expand(
+  str,
+  max,
+  maxLength,
+  maxDepth,
+  depth,
+  maxRewrites,
+  isTop
+) {
+  // Too deeply nested to keep following: treat the rest as literal, the same
+  // way a group that cannot expand is already handled. Truncating rather than
+  // throwing keeps expansion total, matching `max` and `maxLength`.
+  if (depth > maxDepth) {
+    return [str];
+  }
 
-  // no need to expand pre, since it is guaranteed to be free of brace-sets
-  var pre = m.pre;
-  var post = m.post.length
-    ? expand(m.post, false)
-    : [''];
+  // Consume the string's top-level brace groups left to right, threading a
+  // running set of combined prefixes (`acc`). Expanding the tail iteratively -
+  // rather than recursing on `m.post` once per group - keeps the native stack
+  // depth constant, so deeply chained input (`'{a,b}'.repeat(3000)`) can no
+  // longer overflow the stack, and leaves a single accumulator whose size
+  // `maxLength` bounds directly (CVE-2026-14257).
+  var acc = ['']
 
-  var N;
+  // Bash drops empty results, but only when the *first* group of the run is a
+  // comma set - a sequence like `{a..\}` may legitimately yield ''. The drop
+  // is on the final strings, so it is applied to whichever `combine` produces
+  // them (the one with no brace set left in the tail).
+  //
+  // The old implementation recursed on `m.post`, so the drop tested only the
+  // expansion of the current call's substring. The `{a},b}` rewrite below turns
+  // `isTop` back on part-way through a string, starting a fresh such run, so
+  // the drop must ignore whatever `acc` already holds from earlier groups.
+  // `accBase[a]` records how much of `acc[a]` predates the current run;
+  // `combine` treats an expansion as empty when it adds nothing past that.
+  var accBase = [0]
+  // How many times the `{a},b}` rewrite below has restarted the scan. Each pass
+  // re-reads the whole string, so leaving this unbounded is quadratic.
+  var rewrites = 0
+  var dropEmpties = false
+  var firstGroup = true
+  var nextBase
+
+  for (;;) {
+    var m = balanced('{', '}', str);
+
+    // No brace set left: the rest of the string is literal.
+    if (!m) {
+      return combine(acc, accBase, str, [''], max, maxLength, dropEmpties, [])
+    }
+
+    // no need to expand pre, since it is guaranteed to be free of brace-sets
+    var pre = m.pre;
+
+    // For compatibility reasons, `${` is not eligible for brace expansion, and
+    // on the 1.x line it suppresses expansion of the rest of the string too:
+    // the whole remainder is literal. The 2.x and 5.x lines instead keep
+    // expanding the tail, which is what bash does, but changing that here would
+    // be a breaking change for 1.x consumers. Routed through `combine` so the
+    // result is still bounded by `max` and `maxLength`.
+    if (/\$$/.test(pre)) {
+      return combine(acc, accBase, str, [''], max, maxLength, dropEmpties, [])
+    }
+
+    var isNumericSequence = /^-?\d+\.\.-?\d+(?:\.\.-?\d+)?$/.test(m.body);
+    var isAlphaSequence = /^[a-zA-Z]\.\.[a-zA-Z](?:\.\.-?\d+)?$/.test(m.body);
+    var isSequence = isNumericSequence || isAlphaSequence;
+    var isOptions = m.body.indexOf(',') >= 0;
+    if (!isSequence && !isOptions) {
+      // {a},b}
+      if (rewrites < maxRewrites && m.post.match(/,(?!,).*\}/)) {
+        rewrites++;
+        str = m.pre + '{' + m.body + escClose + m.post;
+        // The rewritten string is expanded as if it were a fresh top-level one,
+        // so start a new empty-drop run: anchor the baseline at what `acc`
+        // holds now, and let the next expanding group decide whether to drop.
+        isTop = true
+        firstGroup = true
+        dropEmpties = false
+        accBase = []
+        for (var b = 0; b < acc.length; b++) {
+          accBase.push(acc[b].length)
+        }
+        continue
+      }
+      // Nothing here expands, so the whole remaining string is literal.
+      return combine(
+        acc,
+        accBase,
+        pre + '{' + m.body + '}' + m.post,
+        [''],
+        max,
+        maxLength,
+        dropEmpties,
+        []
+      )
+    }
 
-  if (isSequence) {
-    var x = numeric(n[0]);
-    var y = numeric(n[1]);
-    var width = Math.max(n[0].length, n[1].length)
-    var incr = n.length == 3
-      ? Math.abs(numeric(n[2]))
-      : 1;
-    var test = lte;
-    var reverse = y < x;
-    if (reverse) {
-      incr *= -1;
-      test = gte;
+    if (firstGroup) {
+      dropEmpties = isTop && !isSequence
+      firstGroup = false
     }
-    var pad = n.some(isPadded);
 
-    N = [];
+    var values;
+    if (isSequence) {
+      values = expandSequence(m.body, isAlphaSequence, max, maxLength);
+    } else {
+      var n = parseCommaParts(m.body);
+      if (n.length === 1 && n[0] !== undefined) {
+        // x{{a,b}}y ==> x{a}y x{b}y
+        n = expand(n[0], max, maxLength, maxDepth, depth + 1, maxRewrites, false).map(embrace);
+        //XXX is this necessary? Can't seem to hit it in tests.
+        /* c8 ignore start */
+        if (n.length === 1) {
+          nextBase = []
+          acc = combine(
+            acc,
+            accBase,
+            pre + n[0],
+            [''],
+            max,
+            maxLength,
+            dropEmpties && !m.post.length,
+            nextBase
+          )
+          accBase = nextBase
+          if (!m.post.length) break
+          str = m.post
+          continue
+        }
+        /* c8 ignore stop */
+      }
 
-    for (var i = x; test(i, y); i += incr) {
-      var c;
-      if (isAlphaSequence) {
-        c = String.fromCharCode(i);
-        if (c === '\\')
-          c = '';
-      } else {
-        c = String(i);
-        if (pad) {
-          var need = width - c.length;
-          if (need > 0) {
-            var z = new Array(need + 1).join('0');
-            if (i < 0)
-              c = '-' + z + c.slice(1);
-            else
-              c = z + c;
+      // Values that `combine` is going to drop as empty produce no result, so
+      // they must not count against `max` - otherwise `{a,,b}` with `max: 2`
+      // would stop at `['a', '']` and yield one result instead of two. Skipping
+      // them outright keeps `values` bounded while leaving `max` a bound on
+      // *kept* results. A value is dropped when it adds nothing past the
+      // baseline, which is what `combine` tests.
+      var dropsEmpties = dropEmpties && !m.post.length && !pre
+      for (var d = 0; dropsEmpties && d < acc.length; d++) {
+        if (acc[d].length !== accBase[d]) {
+          dropsEmpties = false
+        }
+      }
+
+      values = []
+      var valuesLength = 0
+      outer: for (var j = 0; j < n.length; j++) {
+        var expanded = expand(n[j], max, maxLength, maxDepth, depth + 1, maxRewrites, false)
+        for (var k = 0; k < expanded.length; k++) {
+          var v = expanded[k]
+          if (dropsEmpties && !v) continue
+          if (values.length >= max || valuesLength + v.length > maxLength) {
+            break outer
           }
+          values.push(v)
+          valuesLength += v.length
         }
       }
-      N.push(c);
     }
-  } else {
-    N = concatMap(n, function(el) { return expand(el, false) });
-  }
 
-  for (var j = 0; j < N.length; j++) {
-    for (var k = 0; k < post.length; k++) {
-      var expansion = pre + N[j] + post[k];
-      if (!isTop || isSequence || expansion)
-        expansions.push(expansion);
-    }
+    nextBase = []
+    acc = combine(
+      acc,
+      accBase,
+      pre,
+      values,
+      max,
+      maxLength,
+      dropEmpties && !m.post.length,
+      nextBase
+    )
+    accBase = nextBase
+    if (!m.post.length) break
+    str = m.post
   }
 
-  return expansions;
+  return acc
 }
 
 
-
 /***/ }),
 
 /***/ 7087:
@@ -14109,11 +14346,77 @@ class Request {
     }
   }
 
-  onUpgrade (statusCode, headers, socket) {
+  /**
+   * @param {number|null} statusCode
+   * @param {Buffer[]|null} headers
+   * @param {import('node:stream').Duplex} socket
+   * @param {string} [statusText]
+   */
+  onUpgrade (statusCode, headers, socket, statusText = '') {
+    this.onFinally()
+
     assert(!this.aborted)
     assert(!this.completed)
 
-    return this[kHandler].onUpgrade(statusCode, headers, socket)
+    if (statusCode !== null) {
+      this.#publishUpgradeHeaders(statusCode, headers, statusText)
+    }
+
+    const result = this[kHandler].onUpgrade(statusCode, headers, socket)
+
+    if (!this.aborted) {
+      this.completed = true
+      if (statusCode !== null) {
+        this.#publishUpgradeTrailers()
+      }
+    }
+
+    return result
+  }
+
+  /**
+   * @param {number} statusCode
+   * @param {import('node:http2').IncomingHttpHeaders} headers
+   * @param {(headers: import('node:http2').IncomingHttpHeaders) => Buffer[]} parseHeaders
+   * @param {string} [statusText]
+   */
+  onUpgradeResponse (statusCode, headers, parseHeaders, statusText = '') {
+    assert(!this.aborted)
+    assert(this.completed)
+
+    if (channels.headers.hasSubscribers) {
+      this.#publishUpgradeHeaders(statusCode, parseHeaders(headers), statusText)
+    }
+    this.#publishUpgradeTrailers()
+  }
+
+  /**
+   * @param {Error} error
+   */
+  onUpgradeError (error) {
+    assert(!this.aborted)
+    assert(this.completed)
+
+    if (channels.error.hasSubscribers) {
+      channels.error.publish({ request: this, error })
+    }
+  }
+
+  /**
+   * @param {number} statusCode
+   * @param {Buffer[]} headers
+   * @param {string} statusText
+   */
+  #publishUpgradeHeaders (statusCode, headers, statusText) {
+    if (channels.headers.hasSubscribers) {
+      channels.headers.publish({ request: this, response: { statusCode, headers, statusText } })
+    }
+  }
+
+  #publishUpgradeTrailers () {
+    if (channels.trailers.hasSubscribers) {
+      channels.trailers.publish({ request: this, trailers: [] })
+    }
   }
 
   onComplete (trailers) {
@@ -14196,7 +14499,13 @@ function processHeader (request, key, val) {
       } else if (typeof val[i] === 'object') {
         throw new InvalidArgumentError(`invalid ${key} header`)
       } else {
-        arr.push(`${val[i]}`)
+        // Coerce primitives (and reject unsafe coercions such as functions
+        // with a crafted toString/Symbol.toPrimitive).
+        const str = `${val[i]}`
+        if (!isValidHeaderValue(str)) {
+          throw new InvalidArgumentError(`invalid ${key} header`)
+        }
+        arr.push(str)
       }
     }
     val = arr
@@ -14207,7 +14516,12 @@ function processHeader (request, key, val) {
   } else if (val === null) {
     val = ''
   } else {
+    // Coerce primitives (and reject unsafe coercions such as functions
+    // with a crafted toString/Symbol.toPrimitive).
     val = `${val}`
+    if (!isValidHeaderValue(val)) {
+      throw new InvalidArgumentError(`invalid ${key} header`)
+    }
   }
 
   if (headerName === 'host') {
@@ -15240,7 +15554,7 @@ function defaultFactory (origin, opts) {
 }
 
 class Agent extends DispatcherBase {
-  constructor ({ factory = defaultFactory, maxRedirections = 0, connect, ...options } = {}) {
+  constructor ({ factory = defaultFactory, maxRedirections = 0, connect, tls, ...options } = {}) {
     if (typeof factory !== 'function') {
       throw new InvalidArgumentError('factory must be a function.')
     }
@@ -15259,11 +15573,15 @@ class Agent extends DispatcherBase {
       connect = { ...connect }
     }
 
+    if (tls && typeof tls !== 'function') {
+      tls = { ...tls }
+    }
+
     this[kInterceptors] = options.interceptors?.Agent && Array.isArray(options.interceptors.Agent)
       ? options.interceptors.Agent
       : [createRedirectInterceptor({ maxRedirections })]
 
-    this[kOptions] = { ...util.deepClone(options), connect }
+    this[kOptions] = { ...util.deepClone(options), connect, tls }
     this[kOptions].interceptors = options.interceptors
       ? { ...options.interceptors }
       : undefined
@@ -15579,6 +15897,7 @@ const {
   RequestContentLengthMismatchError,
   ResponseContentLengthMismatchError,
   RequestAbortedError,
+  InvalidArgumentError,
   HeadersTimeoutError,
   HeadersOverflowError,
   SocketError,
@@ -16000,7 +16319,7 @@ class Parser {
   }
 
   onUpgrade (head) {
-    const { upgrade, client, socket, headers, statusCode } = this
+    const { upgrade, client, socket, headers, statusCode, statusText } = this
 
     assert(upgrade)
     assert(client[kSocket] === socket)
@@ -16035,9 +16354,10 @@ class Parser {
     client.emit('disconnect', client[kUrl], [client], new InformationalError('upgrade'))
 
     try {
-      request.onUpgrade(statusCode, headers, socket)
-    } catch (err) {
-      util.destroy(socket, err)
+      request.onUpgrade(statusCode, headers, socket, statusText)
+    } catch (error) {
+      util.errorRequest(client, request, error)
+      util.destroy(socket, error)
     }
 
     client[kResume]()
@@ -16294,8 +16614,6 @@ async function connectH1 (client, socket) {
   socket[kParser] = new Parser(client, socket, llhttpInstance)
 
   addListener(socket, 'error', function (err) {
-    assert(err.code !== 'ERR_TLS_CERT_ALTNAME_INVALID')
-
     const parser = this[kParser]
 
     // On Mac OS, we get an ECONNRESET even if there is a full body to be forwarded
@@ -16444,7 +16762,7 @@ async function connectH1 (client, socket) {
 
 function clearIdleSocketValidation (socket) {
   if (socket[kIdleSocketValidationTimeout]) {
-    clearTimeout(socket[kIdleSocketValidationTimeout])
+    clearImmediate(socket[kIdleSocketValidationTimeout])
     socket[kIdleSocketValidationTimeout] = null
   }
 
@@ -16453,15 +16771,23 @@ function clearIdleSocketValidation (socket) {
 
 function scheduleIdleSocketValidation (client, socket) {
   socket[kIdleSocketValidation] = 1
-  socket[kIdleSocketValidationTimeout] = setTimeout(() => {
+  // Yield to the check phase (after poll) so unsolicited bytes / FIN / RST
+  // already pending on this idle keep-alive socket are processed before the
+  // next request is written (GHSA-35p6-xmwp-9g52).
+  //
+  // setTimeout(0) pays Node's ~1ms timer floor on every sequential reuse
+  // (#5493). setImmediate avoids that, but an *unref'd* Immediate lets poll
+  // block for ~500ms when the event loop is otherwise idle (#5600 / #5606).
+  // A ref'd Immediate both keeps the pending request alive and makes poll
+  // return immediately — the hybrid those issues asked for.
+  socket[kIdleSocketValidationTimeout] = setImmediate(() => {
     socket[kIdleSocketValidationTimeout] = null
     socket[kIdleSocketValidation] = 2
 
     if (client[kSocket] === socket && !socket.destroyed) {
       client[kResume]()
     }
-  }, 0)
-  socket[kIdleSocketValidationTimeout].unref?.()
+  })
 }
 
 /**
@@ -16562,8 +16888,16 @@ function writeH1 (client, request) {
     }
     body = bodyStream.stream
     contentLength = bodyStream.length
-  } else if (util.isBlobLike(body) && request.contentType == null && body.type) {
-    headers.push('content-type', body.type)
+  } else if (util.isBlobLike(body) && request.contentType == null) {
+    const contentType = body.type
+    if (contentType) {
+      const contentTypeValue = `${contentType}`
+      if (!util.isValidHeaderValue(contentTypeValue)) {
+        util.errorRequest(client, request, new InvalidArgumentError('invalid content-type header'))
+        return false
+      }
+      headers.push('content-type', contentTypeValue)
+    }
   }
 
   if (body && typeof body.read === 'function') {
@@ -16602,12 +16936,22 @@ function writeH1 (client, request) {
   const socket = client[kSocket]
   clearIdleSocketValidation(socket)
 
-  const abort = (err) => {
-    if (request.aborted || request.completed) {
+  /**
+   * @param {Error} [error]
+   */
+  const abort = (error) => {
+    if (request.aborted) {
+      return
+    }
+
+    if (request.completed) {
+      if (request.upgrade || request.method === 'CONNECT') {
+        util.destroy(socket, new InformationalError('aborted'))
+      }
       return
     }
 
-    util.errorRequest(client, request, err || new RequestAbortedError())
+    util.errorRequest(client, request, error || new RequestAbortedError())
 
     util.destroy(body)
     util.destroy(socket, new InformationalError('aborted'))
@@ -17064,6 +17408,7 @@ module.exports = connectH1
 
 
 const assert = __nccwpck_require__(4589)
+const { errorMonitor } = __nccwpck_require__(8474)
 const { pipeline } = __nccwpck_require__(7075)
 const util = __nccwpck_require__(3440)
 const {
@@ -17140,6 +17485,15 @@ function parseH2Headers (headers) {
   return result
 }
 
+/**
+ * @param {import('node:http2').IncomingHttpHeaders} headers
+ * @returns {Buffer[]}
+ */
+function parseH2ResponseHeaders (headers) {
+  const { [HTTP2_HEADER_STATUS]: _statusCode, ...realHeaders } = headers
+  return parseH2Headers(realHeaders)
+}
+
 async function connectH2 (client, socket) {
   client[kSocket] = socket
 
@@ -17189,8 +17543,6 @@ async function connectH2 (client, socket) {
   socket[kHTTP2Session] = session
 
   util.addListener(socket, 'error', function (err) {
-    assert(err.code !== 'ERR_TLS_CERT_ALTNAME_INVALID')
-
     this[kError] = err
 
     this[kClient][kOnError](err)
@@ -17264,8 +17616,6 @@ function resumeH2 (client) {
 }
 
 function onHttp2SessionError (err) {
-  assert(err.code !== 'ERR_TLS_CERT_ALTNAME_INVALID')
-
   this[kSocket][kError] = err
   this[kClient][kOnError](err)
 }
@@ -17360,22 +17710,32 @@ function writeH2 (client, request) {
   headers[HTTP2_HEADER_AUTHORITY] = host || `${hostname}${port ? `:${port}` : ''}`
   headers[HTTP2_HEADER_METHOD] = method
 
-  const abort = (err) => {
-    if (request.aborted || request.completed) {
+  /**
+   * @param {Error} [error]
+   */
+  const abort = (error) => {
+    if (request.aborted) {
+      return
+    }
+
+    if (request.completed) {
+      if (method === 'CONNECT' && stream != null) {
+        util.destroy(stream, error || new RequestAbortedError())
+      }
       return
     }
 
-    err = err || new RequestAbortedError()
+    error = error || new RequestAbortedError()
 
-    util.errorRequest(client, request, err)
+    util.errorRequest(client, request, error)
 
     if (stream != null) {
-      util.destroy(stream, err)
+      util.destroy(stream, error)
     }
 
     // We do not destroy the socket as we can continue using the session
     // the stream get's destroyed and the session remains to create new streams
-    util.destroy(body, err)
+    util.destroy(body, error)
     client[kQueue][client[kRunningIdx]++] = null
     client[kResume]()
   }
@@ -17394,25 +17754,57 @@ function writeH2 (client, request) {
 
   if (method === 'CONNECT') {
     session.ref()
-    // We are already connected, streams are pending, first request
-    // will create a new stream. We trigger a request to create the stream and wait until
-    // `ready` event is triggered
     // We disabled endStream to allow the user to write to the stream
     stream = session.request(headers, { endStream: false, signal })
+    let upgradeResponseFinished = false
 
-    if (stream.id && !stream.pending) {
-      request.onUpgrade(null, null, stream)
-      ++session[kOpenStreams]
-      client[kQueue][client[kRunningIdx]++] = null
-    } else {
-      stream.once('ready', () => {
+    /**
+     * @param {import('node:http2').IncomingHttpHeaders} headers
+     */
+    const onResponse = (headers) => {
+      upgradeResponseFinished = true
+      stream.off(errorMonitor, onUpgradeError)
+      request.onUpgradeResponse(Number(headers[HTTP2_HEADER_STATUS]), headers, parseH2ResponseHeaders)
+    }
+
+    /**
+     * @param {Error} error
+     */
+    const onUpgradeError = (error) => {
+      upgradeResponseFinished = true
+      stream.off('response', onResponse)
+      request.onUpgradeError(error)
+    }
+
+    const onReady = () => {
+      try {
         request.onUpgrade(null, null, stream)
-        ++session[kOpenStreams]
-        client[kQueue][client[kRunningIdx]++] = null
-      })
+      } catch (error) {
+        stream.off('response', onResponse)
+        abort(error)
+        return
+      }
+
+      if (request.aborted) {
+        return
+      }
+
+      stream.off('error', abort)
+      stream.once(errorMonitor, onUpgradeError)
+      client[kQueue][client[kRunningIdx]++] = null
     }
 
+    stream.once('response', onResponse)
+    stream.once('error', abort)
+    ++session[kOpenStreams]
+    onReady()
+
     stream.once('close', () => {
+      if (!upgradeResponseFinished && request.completed) {
+        stream.off('response', onResponse)
+        stream.off(errorMonitor, onUpgradeError)
+        request.onUpgradeError(new InformationalError(`HTTP/2: "stream error" received - code ${stream.rstCode}`))
+      }
       session[kOpenStreams] -= 1
       if (session[kOpenStreams] === 0) session.unref()
     })
@@ -17921,9 +18313,10 @@ class Client extends DispatcherBase {
     // h2
     maxConcurrentStreams,
     allowH2,
-    webSocket
+    webSocket,
+    eventSource
   } = {}) {
-    super({ webSocket })
+    super({ webSocket, eventSource })
 
     if (keepAlive !== undefined) {
       throw new InvalidArgumentError('unsupported keepAlive, use pipelining=0 instead')
@@ -18444,6 +18837,7 @@ module.exports = Client
 
 
 
+const buffer = __nccwpck_require__(4573)
 const Dispatcher = __nccwpck_require__(883)
 const {
   ClientDestroyedError,
@@ -18456,6 +18850,7 @@ const kOnDestroyed = Symbol('onDestroyed')
 const kOnClosed = Symbol('onClosed')
 const kInterceptedDispatch = Symbol('Intercepted Dispatch')
 const kWebSocketOptions = Symbol('webSocketOptions')
+const kEventSourceOptions = Symbol('eventSourceOptions')
 
 class DispatcherBase extends Dispatcher {
   constructor (opts) {
@@ -18466,6 +18861,7 @@ class DispatcherBase extends Dispatcher {
     this[kClosed] = false
     this[kOnClosed] = []
     this[kWebSocketOptions] = opts?.webSocket ?? {}
+    this[kEventSourceOptions] = opts?.eventSource ?? {}
   }
 
   get webSocketOptions () {
@@ -18475,6 +18871,12 @@ class DispatcherBase extends Dispatcher {
     }
   }
 
+  get eventSourceOptions () {
+    return {
+      maxEventSize: this[kEventSourceOptions].maxEventSize ?? buffer.kStringMaxLength
+    }
+  }
+
   get destroyed () {
     return this[kDestroyed]
   }
@@ -20036,6 +20438,28 @@ function calculateRetryAfterHeader (retryAfter) {
   return new Date(retryAfter).getTime() - current
 }
 
+function validatePartialResponseContentLength (headers, range, statusCode, retryCount) {
+  const contentLength = headers['content-length']
+  if (contentLength == null) {
+    return null
+  }
+
+  if (!Number.isFinite(range.start) || !Number.isFinite(range.end)) {
+    return null
+  }
+
+  const length = Number(contentLength)
+  const expectedLength = range.end - range.start + 1
+  if (!Number.isFinite(length) || length !== expectedLength) {
+    return new RequestRetryError('Content-Length mismatch', statusCode, {
+      headers,
+      data: { count: retryCount }
+    })
+  }
+
+  return null
+}
+
 class RetryHandler {
   constructor (opts, handlers) {
     const { retryOptions, ...dispatchOpts } = opts
@@ -20089,6 +20513,7 @@ class RetryHandler {
     this.end = null
     this.etag = null
     this.resume = null
+    this.headersSent = false
 
     // Handle possible onConnect duplication
     this.handler.onConnect(reason => {
@@ -20101,6 +20526,20 @@ class RetryHandler {
     })
   }
 
+  checkpointResponseEnd (headers, resume) {
+    if (this.end == null && this.opts.method !== 'HEAD') {
+      const contentLength = headers['content-length']
+      this.end = contentLength != null ? Number(contentLength) - 1 : null
+
+      assert(
+        this.end == null || Number.isFinite(this.end),
+        'invalid content-length'
+      )
+    }
+
+    this.resume = this.end != null ? resume : null
+  }
+
   onRequestSent () {
     if (this.handler.onRequestSent) {
       this.handler.onRequestSent()
@@ -20189,7 +20628,12 @@ class RetryHandler {
     this.retryCount += 1
 
     if (statusCode >= 300) {
-      if (this.retryOpts.statusCodes.includes(statusCode) === false) {
+      // Only expose a response if no earlier attempt has reached the caller.
+      // Otherwise abort this attempt so the error settles the existing body
+      // instead of replacing it with a new response.
+      if (!this.headersSent && this.retryOpts.statusCodes.includes(statusCode) === false) {
+        this.headersSent = true
+        this.checkpointResponseEnd(headers, resume)
         return this.handler.onHeaders(
           statusCode,
           rawHeaders,
@@ -20250,10 +20694,23 @@ class RetryHandler {
         return false
       }
 
+      const contentLengthError = validatePartialResponseContentLength(headers, contentRange, statusCode, this.retryCount)
+      if (contentLengthError != null) {
+        this.abort(contentLengthError)
+        return false
+      }
+
       const { start, size, end = size - 1 } = contentRange
 
-      assert(this.start === start, 'content-range mismatch')
-      assert(this.end == null || this.end === end, 'content-range mismatch')
+      if (this.start !== start || (this.end != null && this.end !== end)) {
+        this.abort(
+          new RequestRetryError('Content-Range mismatch', statusCode, {
+            headers,
+            data: { count: this.retryCount }
+          })
+        )
+        return false
+      }
 
       this.resume = resume
       return true
@@ -20265,6 +20722,7 @@ class RetryHandler {
         const range = parseRangeHeader(headers['content-range'])
 
         if (range == null) {
+          this.headersSent = true
           return this.handler.onHeaders(
             statusCode,
             rawHeaders,
@@ -20273,6 +20731,12 @@ class RetryHandler {
           )
         }
 
+        const contentLengthError = validatePartialResponseContentLength(headers, range, statusCode, this.retryCount)
+        if (contentLengthError != null) {
+          this.abort(contentLengthError)
+          return false
+        }
+
         const { start, size, end = size - 1 } = range
         assert(
           start != null && Number.isFinite(start),
@@ -20297,6 +20761,7 @@ class RetryHandler {
       )
 
       this.resume = resume
+      this.headersSent = true
       this.etag = headers.etag != null ? headers.etag : null
 
       // Weak etags are not useful for comparison nor cache
@@ -20336,7 +20801,7 @@ class RetryHandler {
   }
 
   onError (err) {
-    if (this.aborted || isDisturbed(this.opts.body)) {
+    if (this.aborted || isDisturbed(this.opts.body) || (this.headersSent && this.resume == null)) {
       return this.handler.onError(err)
     }
 
@@ -24517,7 +24982,7 @@ function validateCookiePath (path) {
 
     if (
       code < 0x20 || // exclude CTLs (0-31)
-      code === 0x7F || // DEL
+      code > 0x7E || // exclude DEL and non-ascii
       code === 0x3B // ;
     ) {
       throw new Error('Invalid cookie path')
@@ -24526,16 +24991,80 @@ function validateCookiePath (path) {
 }
 
 /**
- * I have no idea why these values aren't allowed to be honest,
- * but Deno tests these. - Khafra
+ * <let-dig> ::= <letter> | <digit>
+ *
+ * <letter> ::= any one of the 52 alphabetic characters A through Z in
+ * upper case and a through z in lower case
+ *
+ * <digit> ::= any one of the ten digits 0 through 9r
+ *
+ * @see https://www.rfc-editor.org/rfc/rfc1034#section-3.5
+ * @param {number} code
+ */
+function isLetterOrDigit (code) {
+  return (
+    (code >= 0x30 && code <= 0x39) || // 0-9
+    (code >= 0x41 && code <= 0x5A) || // A-Z
+    (code >= 0x61 && code <= 0x7A) // a-z
+  )
+}
+
+/**
+ * Validates a cookie domain against the "preferred name syntax".
+ *
+ * <domain>      ::= <subdomain> | " "
+ * <subdomain>   ::= <label> | <subdomain> "." <label>
+ * <label>       ::= <let-dig> [ [ <ldh-str> ] <let-dig> ]
+ * <ldh-str>     ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
+ * <let-dig-hyp> ::= <let-dig> | "-"
+ *
+ * @see https://www.rfc-editor.org/rfc/rfc1034#section-3.5
+ * @see https://www.rfc-editor.org/rfc/rfc1123#section-2.1
+ * @see https://www.rfc-editor.org/rfc/rfc1035#section-2.3.4
  * @param {string} domain
  */
 function validateCookieDomain (domain) {
-  if (
-    domain.startsWith('-') ||
-    domain.endsWith('.') ||
-    domain.endsWith('-')
-  ) {
+  // <domain> ::= <subdomain> | " "
+  if (domain === ' ') {
+    return
+  }
+
+  if (domain.length > 255) {
+    throw new Error('Invalid cookie domain')
+  }
+
+  let labelLength = 0
+
+  for (let i = 0; i < domain.length; ++i) {
+    const code = domain.charCodeAt(i)
+
+    if (code === 0x2E) {
+      if (labelLength === 0) {
+        throw new Error('Invalid cookie domain')
+      }
+
+      if (domain.charCodeAt(i - 1) === 0x2D) { // "-"
+        throw new Error('Invalid cookie domain')
+      }
+
+      labelLength = 0
+      continue
+    }
+
+    if (labelLength === 0 && !isLetterOrDigit(code)) {
+      throw new Error('Invalid cookie domain')
+    }
+
+    if (!isLetterOrDigit(code) && code !== 0x2D) { // "-"
+      throw new Error('Invalid cookie domain')
+    }
+
+    if (++labelLength > 63) {
+      throw new Error('Invalid cookie domain')
+    }
+  }
+
+  if (labelLength === 0 || domain.charCodeAt(domain.length - 1) === 0x2D) { // "-"
     throw new Error('Invalid cookie domain')
   }
 }
@@ -24678,7 +25207,13 @@ function stringify (cookie) {
 
     const [key, ...value] = part.split('=')
 
-    out.push(`${key.trim()}=${value.join('=')}`)
+    const trimmedKey = key.trim()
+    const joinedValue = value.join('=')
+
+    validateCookieName(trimmedKey)
+    validateCookieValue(joinedValue)
+
+    out.push(`${trimmedKey}=${joinedValue}`)
   }
 
   return out.join('; ')
@@ -24700,6 +25235,7 @@ module.exports = {
 /***/ ((module, __unused_webpack_exports, __nccwpck_require__) => {
 
 
+const buffer = __nccwpck_require__(4573)
 const { Transform } = __nccwpck_require__(7075)
 const { isASCIINumber, isValidLastEventId } = __nccwpck_require__(4811)
 
@@ -24724,6 +25260,63 @@ const COLON = 0x3A
  */
 const SPACE = 0x20
 
+const defaultMaxEventSize = buffer.kStringMaxLength
+
+const DATA = Buffer.from('data')
+const EVENT = Buffer.from('event')
+const ID = Buffer.from('id')
+const RETRY = Buffer.from('retry')
+
+// Each data field creates a string node, and each unconsumed input chunk keeps
+// a Buffer wrapper. The absolute ceiling protects the large default byte limit.
+const minParserItems = 1024
+const maxParserItems = 131072
+const bytesPerParserItem = 128
+
+function isASCIINumberBytes (buffer, start) {
+  if (start >= buffer.length) {
+    return false
+  }
+
+  for (let i = start; i < buffer.length; i++) {
+    if (buffer[i] < 0x30 || buffer[i] > 0x39) {
+      return false
+    }
+  }
+
+  return true
+}
+
+function isValidLastEventIdBytes (buffer, start) {
+  for (let i = start; i < buffer.length; i++) {
+    if (buffer[i] === 0x00) {
+      return false
+    }
+  }
+
+  return true
+}
+
+function isFieldName (line, length, field) {
+  if (length !== field.length) {
+    return false
+  }
+
+  for (let i = 0; i < length; i++) {
+    if (line[i] !== field[i]) {
+      return false
+    }
+  }
+
+  return true
+}
+
+function createMaxEventSizeExceededError () {
+  const error = new Error('EventSource message size exceeded')
+  error.aborted = false
+  return error
+}
+
 /**
  * @typedef {object} EventSourceStreamEvent
  * @type {object}
@@ -24764,11 +25357,21 @@ class EventSourceStream extends Transform {
   eventEndCheck = false
 
   /**
-   * @type {Buffer}
+   * @type {Buffer[]}
    */
-  buffer = null
+  chunks = []
 
+  chunkIndex = 0
   pos = 0
+  lineChunkIndex = 0
+  linePos = 0
+  lineLength = 0
+  eventSize = 0
+  eventFieldSizes = { data: 0, event: 0, id: 0, retry: 0 }
+  dataLineCount = 0
+  maxEventSize
+  maxDataLines
+  maxBufferedChunks
 
   event = {
     data: undefined,
@@ -24779,6 +25382,7 @@ class EventSourceStream extends Transform {
 
   /**
    * @param {object} options
+   * @param {number} [options.maxEventSize]
    * @param {eventSourceSettings} options.eventSourceSettings
    * @param {Function} [options.push]
    */
@@ -24790,6 +25394,12 @@ class EventSourceStream extends Transform {
     super(options)
 
     this.state = options.eventSourceSettings || {}
+    this.maxEventSize = options.maxEventSize ?? defaultMaxEventSize
+    const parserItemLimit = this.maxEventSize > 0
+      ? Math.min(maxParserItems, Math.max(minParserItems, Math.floor(this.maxEventSize / bytesPerParserItem)))
+      : 0
+    this.maxDataLines = parserItemLimit
+    this.maxBufferedChunks = parserItemLimit
     if (options.push) {
       this.push = options.push
     }
@@ -24807,92 +25417,28 @@ class EventSourceStream extends Transform {
       return
     }
 
-    // Cache the chunk in the buffer, as the data might not be complete while
-    // processing it
-    // TODO: Investigate if there is a more performant way to handle
-    // incoming chunks
-    // see: https://github.com/nodejs/undici/issues/2630
-    if (this.buffer) {
-      this.buffer = Buffer.concat([this.buffer, chunk])
-    } else {
-      this.buffer = chunk
+    // A leading line ending can immediately release the currently buffered
+    // line, even when it uses the final allowed chunk slot.
+    if (this.maxEventSize > 0 &&
+        this.chunks.length >= this.maxBufferedChunks &&
+        chunk[0] !== LF && chunk[0] !== CR) {
+      callback(createMaxEventSizeExceededError())
+      return
     }
+    this.chunks.push(chunk)
 
     // Strip leading byte-order-mark if we opened the stream and started
     // the processing of the incoming data
     if (this.checkBOM) {
-      switch (this.buffer.length) {
-        case 1:
-          // Check if the first byte is the same as the first byte of the BOM
-          if (this.buffer[0] === BOM[0]) {
-            // If it is, we need to wait for more data
-            callback()
-            return
-          }
-          // Set the checkBOM flag to false as we don't need to check for the
-          // BOM anymore
-          this.checkBOM = false
-
-          // The buffer only contains one byte so we need to wait for more data
-          callback()
-          return
-        case 2:
-          // Check if the first two bytes are the same as the first two bytes
-          // of the BOM
-          if (
-            this.buffer[0] === BOM[0] &&
-            this.buffer[1] === BOM[1]
-          ) {
-            // If it is, we need to wait for more data, because the third byte
-            // is needed to determine if it is the BOM or not
-            callback()
-            return
-          }
-
-          // Set the checkBOM flag to false as we don't need to check for the
-          // BOM anymore
-          this.checkBOM = false
-          break
-        case 3:
-          // Check if the first three bytes are the same as the first three
-          // bytes of the BOM
-          if (
-            this.buffer[0] === BOM[0] &&
-            this.buffer[1] === BOM[1] &&
-            this.buffer[2] === BOM[2]
-          ) {
-            // If it is, we can drop the buffered data, as it is only the BOM
-            this.buffer = Buffer.alloc(0)
-            // Set the checkBOM flag to false as we don't need to check for the
-            // BOM anymore
-            this.checkBOM = false
-
-            // Await more data
-            callback()
-            return
-          }
-          // If it is not the BOM, we can start processing the data
-          this.checkBOM = false
-          break
-        default:
-          // The buffer is longer than 3 bytes, so we can drop the BOM if it is
-          // present
-          if (
-            this.buffer[0] === BOM[0] &&
-            this.buffer[1] === BOM[1] &&
-            this.buffer[2] === BOM[2]
-          ) {
-            // Remove the BOM from the buffer
-            this.buffer = this.buffer.subarray(3)
-          }
-
-          // Set the checkBOM flag to false as we don't need to check for the
-          this.checkBOM = false
-          break
+      if (this.handleBOM()) {
+        callback()
+        return
       }
     }
 
-    while (this.pos < this.buffer.length) {
+    while (this.hasCurrentByte()) {
+      const byte = this.currentByte()
+
       // If the previous line ended with an end-of-line, we need to check
       // if the next character is also an end-of-line.
       if (this.eventEndCheck) {
@@ -24905,10 +25451,9 @@ class EventSourceStream extends Transform {
         if (this.crlfCheck) {
           // If the current character is a line feed, we can remove it
           // from the buffer and reset the crlfCheck flag
-          if (this.buffer[this.pos] === LF) {
-            this.buffer = this.buffer.subarray(this.pos + 1)
-            this.pos = 0
+          if (byte === LF) {
             this.crlfCheck = false
+            this.consumeCurrentByte()
 
             // It is possible that the line feed is not the end of the
             // event. We need to check if the next character is an
@@ -24924,19 +25469,17 @@ class EventSourceStream extends Transform {
           this.crlfCheck = false
         }
 
-        if (this.buffer[this.pos] === LF || this.buffer[this.pos] === CR) {
+        if (byte === LF || byte === CR) {
           // If the current character is a carriage return, we need to
           // set the crlfCheck flag to true, as we need to check if the
           // next character is a line feed so we can remove it from the
           // buffer
-          if (this.buffer[this.pos] === CR) {
+          if (byte === CR) {
             this.crlfCheck = true
           }
 
-          this.buffer = this.buffer.subarray(this.pos + 1)
-          this.pos = 0
-          if (
-            this.event.data !== undefined || this.event.event || this.event.id || this.event.retry) {
+          this.consumeCurrentByte()
+          if (this.hasPendingEvent()) {
             this.processEvent(this.event)
           }
           this.clearEvent()
@@ -24950,22 +25493,23 @@ class EventSourceStream extends Transform {
 
       // If the current character is an end-of-line, we can process the
       // line
-      if (this.buffer[this.pos] === LF || this.buffer[this.pos] === CR) {
+      if (byte === LF || byte === CR) {
         // If the current character is a carriage return, we need to
         // set the crlfCheck flag to true, as we need to check if the
         // next character is a line feed
-        if (this.buffer[this.pos] === CR) {
+        if (byte === CR) {
           this.crlfCheck = true
         }
 
         // In any case, we can process the line as we reached an
         // end-of-line character
-        this.parseLine(this.buffer.subarray(0, this.pos), this.event)
-
-        // Remove the processed line from the buffer
-        this.buffer = this.buffer.subarray(this.pos + 1)
-        // Reset the position as we removed the processed line from the buffer
-        this.pos = 0
+        try {
+          this.parseLine(this.readLine(), this.event)
+        } catch (error) {
+          callback(error)
+          return
+        }
+        this.consumeCurrentByte()
         // A line was processed and this could be the end of the event. We need
         // to check if the next line is empty to determine if the event is
         // finished.
@@ -24973,15 +25517,28 @@ class EventSourceStream extends Transform {
         continue
       }
 
-      this.pos++
+      // readLine() is only called after CR or LF. Reject an unfinished line
+      // before it can retain an unbounded number of decoded chunks. The seven
+      // extra bytes allow the longest field prefix ("event: " or "retry: ").
+      if (this.maxEventSize > 0 && ++this.lineLength > this.maxEventSize + 7) {
+        callback(createMaxEventSizeExceededError())
+        return
+      }
+      this.advanceCursor()
     }
 
     callback()
   }
 
+  _destroy (error, callback) {
+    this.chunks.length = 0
+    this.clearEvent()
+    super._destroy(error, callback)
+  }
+
   /**
    * @param {Buffer} line
-   * @param {EventStreamEvent} event
+   * @param {EventSourceStreamEvent} event
    */
   parseLine (line, event) {
     // If the line is empty (a blank line)
@@ -24998,65 +25555,72 @@ class EventSourceStream extends Transform {
       return
     }
 
-    let field = ''
-    let value = ''
+    let fieldLength = line.length
+    let valueStart = line.length
 
     // If the line contains a U+003A COLON character (:)
     if (colonPosition !== -1) {
-      // Collect the characters on the line before the first U+003A COLON
-      // character (:), and let field be that string.
-      // TODO: Investigate if there is a more performant way to extract the
-      // field
-      // see: https://github.com/nodejs/undici/issues/2630
-      field = line.subarray(0, colonPosition).toString('utf8')
+      fieldLength = colonPosition
 
       // Collect the characters on the line after the first U+003A COLON
       // character (:), and let value be that string.
       // If value starts with a U+0020 SPACE character, remove it from value.
-      let valueStart = colonPosition + 1
+      valueStart = colonPosition + 1
       if (line[valueStart] === SPACE) {
         ++valueStart
       }
-      // TODO: Investigate if there is a more performant way to extract the
-      // value
-      // see: https://github.com/nodejs/undici/issues/2630
-      value = line.subarray(valueStart).toString('utf8')
+    }
+
+    if (isFieldName(line, fieldLength, DATA)) {
+      if (this.maxEventSize > 0 && this.dataLineCount >= this.maxDataLines) {
+        throw createMaxEventSizeExceededError()
+      }
+      const valueBytes = line.length - valueStart
+      const dataSize = this.eventFieldSizes.data + (event.data === undefined ? 0 : 1) + valueBytes
+      this.setEventFieldSize('data', dataSize)
 
-      // Otherwise, the string is not empty but does not contain a U+003A COLON
-      // character (:)
-    } else {
-      // Process the field using the steps described below, using the whole
-      // line as the field name, and the empty string as the field value.
-      field = line.toString('utf8')
-      value = ''
-    }
-
-    // Modify the event with the field name and value. The value is also
-    // decoded as UTF-8
-    switch (field) {
-      case 'data':
-        if (event[field] === undefined) {
-          event[field] = value
-        } else {
-          event[field] += `\n${value}`
-        }
-        break
-      case 'retry':
-        if (isASCIINumber(value)) {
-          event[field] = value
-        }
-        break
-      case 'id':
-        if (isValidLastEventId(value)) {
-          event[field] = value
-        }
-        break
-      case 'event':
-        if (value.length > 0) {
-          event[field] = value
-        }
-        break
+      const value = line.toString('utf8', valueStart)
+
+      if (event.data === undefined) {
+        event.data = value
+      } else {
+        event.data += `\n${value}`
+      }
+      this.dataLineCount++
+      return
+    }
+
+    if (isFieldName(line, fieldLength, RETRY)) {
+      if (isASCIINumberBytes(line, valueStart)) {
+        this.setEventFieldSize('retry', line.length - valueStart)
+        event.retry = line.toString('utf8', valueStart)
+      }
+      return
+    }
+
+    if (isFieldName(line, fieldLength, ID)) {
+      if (isValidLastEventIdBytes(line, valueStart)) {
+        this.setEventFieldSize('id', line.length - valueStart)
+        event.id = line.toString('utf8', valueStart)
+      }
+      return
+    }
+
+    if (isFieldName(line, fieldLength, EVENT)) {
+      if (valueStart < line.length) {
+        this.setEventFieldSize('event', line.length - valueStart)
+        event.event = line.toString('utf8', valueStart)
+      }
+    }
+  }
+
+  setEventFieldSize (field, size) {
+    const eventSize = this.eventSize - this.eventFieldSizes[field] + size
+    if (this.maxEventSize > 0 && eventSize > this.maxEventSize) {
+      throw createMaxEventSizeExceededError()
     }
+    this.eventSize = eventSize
+    this.eventFieldSizes[field] = size
   }
 
   /**
@@ -25085,13 +25649,160 @@ class EventSourceStream extends Transform {
   }
 
   clearEvent () {
-    this.event = {
-      data: undefined,
-      event: undefined,
-      id: undefined,
-      retry: undefined
+    this.event.data = undefined
+    this.event.event = undefined
+    this.event.id = undefined
+    this.event.retry = undefined
+    this.eventSize = 0
+    this.dataLineCount = 0
+    this.eventFieldSizes.data = 0
+    this.eventFieldSizes.event = 0
+    this.eventFieldSizes.id = 0
+    this.eventFieldSizes.retry = 0
+  }
+
+  hasPendingEvent () {
+    return this.event.data !== undefined ||
+      this.event.event !== undefined ||
+      this.event.id !== undefined ||
+      this.event.retry !== undefined
+  }
+
+  hasCurrentByte () {
+    return this.chunkIndex < this.chunks.length &&
+      this.pos < this.chunks[this.chunkIndex].length
+  }
+
+  currentByte () {
+    return this.chunks[this.chunkIndex][this.pos]
+  }
+
+  consumeCurrentByte () {
+    this.advanceCursor()
+    this.syncLineStartToCursor()
+  }
+
+  advanceCursor () {
+    this.pos++
+
+    while (this.chunkIndex < this.chunks.length && this.pos >= this.chunks[this.chunkIndex].length) {
+      this.chunkIndex++
+      this.pos = 0
     }
   }
+
+  syncLineStartToCursor () {
+    this.lineChunkIndex = this.chunkIndex
+    this.linePos = this.pos
+    this.lineLength = 0
+    this.dropConsumedChunks()
+  }
+
+  dropConsumedChunks () {
+    if (this.lineChunkIndex > 0) {
+      const consumed = this.lineChunkIndex
+      this.chunks.splice(0, consumed)
+      this.lineChunkIndex = 0
+      this.chunkIndex -= consumed
+    }
+
+    if (this.chunkIndex === this.chunks.length) {
+      this.chunks.length = 0
+      this.chunkIndex = 0
+      this.pos = 0
+      this.lineChunkIndex = 0
+      this.linePos = 0
+    }
+  }
+
+  readLine () {
+    if (this.lineChunkIndex === this.chunkIndex) {
+      return this.chunks[this.chunkIndex].subarray(this.linePos, this.pos)
+    }
+
+    const chunks = []
+    let length = 0
+
+    for (let i = this.lineChunkIndex; i <= this.chunkIndex; i++) {
+      const chunk = this.chunks[i]
+      const start = i === this.lineChunkIndex ? this.linePos : 0
+      const end = i === this.chunkIndex ? this.pos : chunk.length
+      const slice = chunk.subarray(start, end)
+      length += slice.length
+      chunks.push(slice)
+    }
+
+    return Buffer.concat(chunks, length)
+  }
+
+  peekBufferedByte (offset) {
+    let chunkIndex = this.lineChunkIndex
+    let pos = this.linePos
+
+    while (chunkIndex < this.chunks.length) {
+      const chunk = this.chunks[chunkIndex]
+      const remaining = chunk.length - pos
+
+      if (offset < remaining) {
+        return chunk[pos + offset]
+      }
+
+      offset -= remaining
+      chunkIndex++
+      pos = 0
+    }
+  }
+
+  discardLeadingBytes (count) {
+    while (count > 0 && this.lineChunkIndex < this.chunks.length) {
+      const chunk = this.chunks[this.lineChunkIndex]
+      const remaining = chunk.length - this.linePos
+
+      if (count < remaining) {
+        this.linePos += count
+        count = 0
+      } else {
+        count -= remaining
+        this.lineChunkIndex++
+        this.linePos = 0
+      }
+    }
+
+    this.chunkIndex = this.lineChunkIndex
+    this.pos = this.linePos
+    this.dropConsumedChunks()
+  }
+
+  handleBOM () {
+    const first = this.peekBufferedByte(0)
+    const second = this.peekBufferedByte(1)
+    const third = this.peekBufferedByte(2)
+
+    if (second === undefined) {
+      if (first === BOM[0]) {
+        return true
+      }
+
+      this.checkBOM = false
+      return true
+    }
+
+    if (third === undefined) {
+      if (first === BOM[0] && second === BOM[1]) {
+        return true
+      }
+
+      this.checkBOM = false
+      return false
+    }
+
+    if (first === BOM[0] && second === BOM[1] && third === BOM[2]) {
+      this.discardLeadingBytes(3)
+    }
+
+    this.checkBOM = false
+    return !this.hasCurrentByte()
+  }
 }
 
 module.exports = {
@@ -25117,6 +25828,7 @@ const { isNetworkError } = __nccwpck_require__(9051)
 const { delay } = __nccwpck_require__(4811)
 const { kEnumerableProperty } = __nccwpck_require__(3440)
 const { environmentSettingsObject } = __nccwpck_require__(3168)
+const { getGlobalDispatcher } = __nccwpck_require__(2581)
 
 let experimentalWarned = false
 
@@ -25398,6 +26110,7 @@ class EventSource extends EventTarget {
 
       const eventSourceStream = new EventSourceStream({
         eventSourceSettings: this.#state,
+        maxEventSize: this.#dispatcher.eventSourceOptions?.maxEventSize,
         push: (event) => {
           this.dispatchEvent(createFastMessageEvent(
             event.type,
@@ -25576,7 +26289,8 @@ webidl.converters.EventSourceInitDict = webidl.dictionaryConverter([
   },
   {
     key: 'dispatcher', // undici only
-    converter: webidl.converters.any
+    converter: webidl.converters.any,
+    defaultValue: () => getGlobalDispatcher()
   }
 ])
 
@@ -30672,8 +31386,10 @@ async function httpNetworkFetch (
   // 19. Run these steps in parallel:
 
   //    1. Run these steps, but abort when fetchParams is canceled:
-  fetchParams.controller.onAborted = onAborted
-  fetchParams.controller.on('terminated', onAborted)
+  if (!fetchParams.controller.resume) {
+    fetchParams.controller.on('terminated', onAborted)
+  }
+
   fetchParams.controller.resume = async () => {
     // 1. While true
     while (true) {
@@ -30842,8 +31558,6 @@ async function httpNetworkFetch (
           }
           location = headersList.get('location', true)
 
-          this.body = new Readable({ read: resume })
-
           const decoders = []
 
           const willFollow = location && request.redirect === 'follow' &&
@@ -30861,7 +31575,7 @@ async function httpNetworkFetch (
             // CVE fix similar to urllib3 (GHSA-gm62-xv2j-4w53) and curl (CVE-2022-32206).
             const maxContentEncodings = 5
             if (codings.length > maxContentEncodings) {
-              reject(new Error(`too many content-encodings in response: ${codings.length}, maximum allowed is ${maxContentEncodings}`))
+              this.abort(new Error(`too many content-encodings in response: ${codings.length}, maximum allowed is ${maxContentEncodings}`))
               return true
             }
 
@@ -30894,6 +31608,8 @@ async function httpNetworkFetch (
             }
           }
 
+          this.body = new Readable({ read: resume })
+
           const onError = this.onError.bind(this)
 
           resolve({
@@ -30940,10 +31656,6 @@ async function httpNetworkFetch (
             fetchParams.controller.off('terminated', this.abort)
           }
 
-          if (fetchParams.controller.onAborted) {
-            fetchParams.controller.off('terminated', fetchParams.controller.onAborted)
-          }
-
           fetchParams.controller.ended = true
 
           this.body.push(null)
@@ -36359,7 +37071,7 @@ function establishWebSocketConnection (url, protocols, client, ws, onEstablish,
         // is specified, the server needs to include the same field and one of
         // the selected subprotocol values in its response for the connection to
         // be established.
-        if (!requestProtocols.includes(secProtocol)) {
+        if (requestProtocols === null || !requestProtocols.includes(secProtocol)) {
           failWebsocketConnection(ws, 'Protocol was not set in the opening handshake.')
           return
         }
@@ -37120,7 +37832,12 @@ class PerMessageDeflate {
 
         if (this.#maxPayloadSize > 0 && this.#inflate[kLength] > this.#maxPayloadSize) {
           callback(new MessageSizeExceededError())
+          // The inflater may still hold buffered input that can emit a late
+          // zlib error. Remove the data listener, then deterministically stop
+          // the stream so a subsequent 'error' cannot fire without a listener
+          // (which would terminate the process as an unhandled error event).
           this.#inflate.removeAllListeners()
+          this.#inflate.destroy()
           this.#inflate = null
           return
         }
@@ -37413,6 +38130,20 @@ class ByteParser extends Writable {
         if (isControlFrame(this.#info.opcode)) {
           this.#loop = this.parseControlFrame(body)
           this.#state = parserStates.INFO
+
+          // If the automatic PONG/CLOSE reply filled the socket's write buffer,
+          // stop parsing and resume on drain so a PING flood cannot grow the
+          // outbound queue without bound.
+          const socket = this.ws[kResponse].socket
+          if (this.#loop && socket.writableNeedDrain) {
+            this.#loop = false
+            socket.once('drain', () => {
+              if (this.destroyed) return
+              this.#loop = true
+              this.run(callback)
+            })
+            return
+          }
         } else {
           if (!this.#info.compressed) {
             if (!this.writeFragments(body)) {
diff --git a/dist/restore/index.js b/dist/restore/index.js
index c7cb184..b2a9673 100644
--- a/dist/restore/index.js
+++ b/dist/restore/index.js
@@ -8001,6 +8001,40 @@ var escClose = '\0CLOSE'+Math.random()+'\0';
 var escComma = '\0COMMA'+Math.random()+'\0';
 var escPeriod = '\0PERIOD'+Math.random()+'\0';
 
+var EXPANSION_MAX = 100000
+
+// `EXPANSION_MAX` caps the *number* of expansions, but not their length. An
+// input like `'{a,b}'.repeat(1500)` stays under that count - its output is
+// truncated to 100k results - while making every result ~1500 characters
+// long. The result set, and the intermediate arrays built while combining
+// brace sets, then grow large enough to exhaust memory and crash the process
+// (CVE-2026-14257). `EXPANSION_MAX_LENGTH` bounds the total number of
+// characters the accumulator may hold at any point, so memory stays flat no
+// matter how many brace groups are chained. The limit sits well above any
+// realistic expansion (100k results hitting `EXPANSION_MAX` measure ~1M
+// characters) so legitimate input is unaffected.
+var EXPANSION_MAX_LENGTH = 4000000
+
+// `expand` recurses once per level of brace *nesting* - both when expanding a
+// set's comma members and when re-wrapping a set whose body is a single part.
+// The CVE-2026-14257 fix made the *tail* iterative (recursion on `m.post`, one
+// level per chained group), which left nesting depth unbounded: about 3,100
+// levels of `{{{...a,b...}}}` - only ~6KB of input - exhausted the native stack
+// and crashed the process. `EXPANSION_MAX_DEPTH` bounds how deep the parser
+// will follow nesting. It sits far above any realistic pattern and well below
+// the depth at which the stack runs out.
+var EXPANSION_MAX_DEPTH = 1000
+
+// Bash keeps a quirk where a brace group followed by a comma set still expands
+// (`{a},b}`). The parser implements it by rewriting the string and restarting
+// the scan, absorbing one `}` per pass. `n` trailing braces therefore cost `n`
+// full passes over a string that itself grows by one `escClose` sentinel each
+// time - quadratic in `n`, with a ~26x constant from the sentinel's length.
+// 128KB of `'{a}' + '}'.repeat(n) + ',z}'` blocked the event loop for 27
+// seconds to produce two results. `EXPANSION_MAX_REWRITES` bounds how many
+// times the scan may restart. Real `{a},b}` input needs a handful.
+var EXPANSION_MAX_REWRITES = 1000
+
 function numeric(str) {
   return parseInt(str, 10) == str
     ? parseInt(str, 10)
@@ -8024,40 +8058,66 @@ function unescapeBraces(str) {
 }
 
 
+// Like `target.push(...items)` but doesn't overflow the stack
+function pushAll(target, items) {
+  for (var i = 0; i < items.length; i++) {
+    target.push(items[i]);
+  }
+}
+
 // Basically just str.split(","), but handling cases
 // where we have nested braced sections, which should be
 // treated as individual members, like {a,{b,c},d}
 function parseCommaParts(str) {
-  if (!str)
-    return [''];
-
   var parts = [];
-  var m = balanced('{', '}', str);
 
-  if (!m)
-    return str.split(',');
+  // Walk the brace groups iteratively. Recursing on `post` once per group let a
+  // chain of them exhaust the stack - the parsing-side counterpart to
+  // the `expand` overflow fixed for CVE-2026-14257, and not something `max` or
+  // `maxLength` can bound, since it happens before expansion.
+  //
+  // The part the next chunk continues
+  var carry = '';
 
-  var pre = m.pre;
-  var body = m.body;
-  var post = m.post;
-  var p = pre.split(',');
+  for (;;) {
+    var m = balanced('{', '}', str);
 
-  p[p.length-1] += '{' + body + '}';
-  var postParts = parseCommaParts(post);
-  if (post.length) {
-    p[p.length-1] += postParts.shift();
-    p.push.apply(p, postParts);
-  }
+    if (!m) {
+      var tail = str.split(',');
+      tail[0] = carry + tail[0];
+      pushAll(parts, tail);
+      return parts;
+    }
 
-  parts.push.apply(parts, p);
+    var pre = m.pre;
+    var body = m.body;
+    var post = m.post;
+    var p = pre.split(',');
+
+    p[0] = carry + p[0];
+    p[p.length-1] += '{' + body + '}';
+
+    if (!post.length) {
+      pushAll(parts, p);
+      return parts;
+    }
 
-  return parts;
+    carry = p.pop();
+    pushAll(parts, p);
+    str = post;
+  }
 }
 
-function expandTop(str) {
+function expandTop(str, options) {
   if (!str)
     return [];
 
+  options = options || {};
+  var max = options.max == null ? EXPANSION_MAX : options.max;
+  var maxLength = options.maxLength == null ? EXPANSION_MAX_LENGTH : options.maxLength;
+  var maxDepth = options.maxDepth == null ? EXPANSION_MAX_DEPTH : options.maxDepth;
+  var maxRewrites = options.maxRewrites == null ? EXPANSION_MAX_REWRITES : options.maxRewrites;
+
   // I don't know why Bash 4.3 does this, but it does.
   // Anything starting with {} will have the first two bytes preserved
   // but *only* at the top level, so {},a}b will not expand to anything,
@@ -8068,7 +8128,7 @@ function expandTop(str) {
     str = '\\{\\}' + str.substr(2);
   }
 
-  return expand(escapeBraces(str), true).map(unescapeBraces);
+  return expand(escapeBraces(str), max, maxLength, maxDepth, 0, maxRewrites, true).map(unescapeBraces);
 }
 
 function identity(e) {
@@ -8089,110 +8149,287 @@ function gte(i, y) {
   return i >= y;
 }
 
-function expand(str, isTop) {
-  var expansions = [];
-
-  var m = balanced('{', '}', str);
-  if (!m || /\$$/.test(m.pre)) return [str];
-
-  var isNumericSequence = /^-?\d+\.\.-?\d+(?:\.\.-?\d+)?$/.test(m.body);
-  var isAlphaSequence = /^[a-zA-Z]\.\.[a-zA-Z](?:\.\.-?\d+)?$/.test(m.body);
-  var isSequence = isNumericSequence || isAlphaSequence;
-  var isOptions = m.body.indexOf(',') >= 0;
-  if (!isSequence && !isOptions) {
-    // {a},b}
-    if (m.post.match(/,(?!,).*\}/)) {
-      str = m.pre + '{' + m.body + escClose + m.post;
-      return expand(str);
+// Build `{ acc[a] + pre + values[v] }` for every combination, capping the
+// number of results at `max` and the total number of characters at `maxLength`.
+// This is the one place output grows, so bounding it here keeps the single
+// accumulator - and therefore memory - flat regardless of how many brace groups
+// are combined (CVE-2026-14257).
+//
+// `base[a]` is the length of the part of `acc[a]` that predates the current
+// empty-drop baseline (see `expand`). The matching baselines for the results
+// are appended to `outBase`, which the caller carries forward alongside them.
+function combine(
+  acc,
+  base,
+  pre,
+  values,
+  max,
+  maxLength,
+  dropEmpties,
+  outBase
+) {
+  var out = []
+  var length = 0
+  for (var a = 0; a < acc.length; a++) {
+    for (var v = 0; v < values.length; v++) {
+      if (out.length >= max) return out
+      var expansion = acc[a] + pre + values[v]
+      // Bash drops empty results at the top level. Skip them before they count
+      // against `max`, so `max` bounds the number of *kept* results. "Empty"
+      // means "adds nothing past the baseline", not "empty overall".
+      if (dropEmpties && expansion.length === base[a]) continue
+      if (length + expansion.length > maxLength) return out
+      out.push(expansion)
+      outBase.push(base[a])
+      length += expansion.length
     }
-    return [str];
   }
+  return out
+}
 
-  var n;
-  if (isSequence) {
-    n = m.body.split(/\.\./);
-  } else {
-    n = parseCommaParts(m.body);
-    if (n.length === 1) {
-      // x{{a,b}}y ==> x{a}y x{b}y
-      n = expand(n[0], false).map(embrace);
-      if (n.length === 1) {
-        var post = m.post.length
-          ? expand(m.post, false)
-          : [''];
-        return post.map(function(p) {
-          return m.pre + n[0] + p;
-        });
+// The expansion values of a single numeric (`1..5`) or alphabetic (`a..e..2`)
+// sequence body.
+function expandSequence(
+  body,
+  isAlphaSequence,
+  max,
+  maxLength
+) {
+  var n = body.split(/\.\./)
+  var N = []
+  // A sequence body always splits into two or three parts, but the compiler
+  // can't know that.
+  /* c8 ignore start */
+  if (n[0] === undefined || n[1] === undefined) {
+    return N
+  }
+  /* c8 ignore stop */
+  var x = numeric(n[0])
+  var y = numeric(n[1])
+  var width = Math.max(n[0].length, n[1].length)
+  var incr =
+    n.length === 3 && n[2] !== undefined ?
+      Math.max(Math.abs(numeric(n[2])), 1)
+    : 1
+  var test = lte
+  var reverse = y < x
+  if (reverse) {
+    incr *= -1
+    test = gte
+  }
+  var pad = n.some(isPadded)
+
+  var length = 0
+  for (var i = x; test(i, y) && N.length < max; i += incr) {
+    var c
+    if (isAlphaSequence) {
+      c = String.fromCharCode(i)
+      if (c === '\\') {
+        c = ''
+      }
+    } else {
+      c = String(i)
+      if (pad) {
+        var need = width - c.length
+        if (need > 0) {
+          var z = new Array(need + 1).join('0')
+          if (i < 0) {
+            c = '-' + z + c.slice(1)
+          } else {
+            c = z + c
+          }
+        }
       }
     }
+    if (length + c.length > maxLength) break
+    N.push(c)
+    length += c.length
   }
+  return N
+}
 
-  // at this point, n is the parts, and we know it's not a comma set
-  // with a single entry.
+function expand(
+  str,
+  max,
+  maxLength,
+  maxDepth,
+  depth,
+  maxRewrites,
+  isTop
+) {
+  // Too deeply nested to keep following: treat the rest as literal, the same
+  // way a group that cannot expand is already handled. Truncating rather than
+  // throwing keeps expansion total, matching `max` and `maxLength`.
+  if (depth > maxDepth) {
+    return [str];
+  }
 
-  // no need to expand pre, since it is guaranteed to be free of brace-sets
-  var pre = m.pre;
-  var post = m.post.length
-    ? expand(m.post, false)
-    : [''];
+  // Consume the string's top-level brace groups left to right, threading a
+  // running set of combined prefixes (`acc`). Expanding the tail iteratively -
+  // rather than recursing on `m.post` once per group - keeps the native stack
+  // depth constant, so deeply chained input (`'{a,b}'.repeat(3000)`) can no
+  // longer overflow the stack, and leaves a single accumulator whose size
+  // `maxLength` bounds directly (CVE-2026-14257).
+  var acc = ['']
 
-  var N;
+  // Bash drops empty results, but only when the *first* group of the run is a
+  // comma set - a sequence like `{a..\}` may legitimately yield ''. The drop
+  // is on the final strings, so it is applied to whichever `combine` produces
+  // them (the one with no brace set left in the tail).
+  //
+  // The old implementation recursed on `m.post`, so the drop tested only the
+  // expansion of the current call's substring. The `{a},b}` rewrite below turns
+  // `isTop` back on part-way through a string, starting a fresh such run, so
+  // the drop must ignore whatever `acc` already holds from earlier groups.
+  // `accBase[a]` records how much of `acc[a]` predates the current run;
+  // `combine` treats an expansion as empty when it adds nothing past that.
+  var accBase = [0]
+  // How many times the `{a},b}` rewrite below has restarted the scan. Each pass
+  // re-reads the whole string, so leaving this unbounded is quadratic.
+  var rewrites = 0
+  var dropEmpties = false
+  var firstGroup = true
+  var nextBase
+
+  for (;;) {
+    var m = balanced('{', '}', str);
+
+    // No brace set left: the rest of the string is literal.
+    if (!m) {
+      return combine(acc, accBase, str, [''], max, maxLength, dropEmpties, [])
+    }
+
+    // no need to expand pre, since it is guaranteed to be free of brace-sets
+    var pre = m.pre;
+
+    // For compatibility reasons, `${` is not eligible for brace expansion, and
+    // on the 1.x line it suppresses expansion of the rest of the string too:
+    // the whole remainder is literal. The 2.x and 5.x lines instead keep
+    // expanding the tail, which is what bash does, but changing that here would
+    // be a breaking change for 1.x consumers. Routed through `combine` so the
+    // result is still bounded by `max` and `maxLength`.
+    if (/\$$/.test(pre)) {
+      return combine(acc, accBase, str, [''], max, maxLength, dropEmpties, [])
+    }
+
+    var isNumericSequence = /^-?\d+\.\.-?\d+(?:\.\.-?\d+)?$/.test(m.body);
+    var isAlphaSequence = /^[a-zA-Z]\.\.[a-zA-Z](?:\.\.-?\d+)?$/.test(m.body);
+    var isSequence = isNumericSequence || isAlphaSequence;
+    var isOptions = m.body.indexOf(',') >= 0;
+    if (!isSequence && !isOptions) {
+      // {a},b}
+      if (rewrites < maxRewrites && m.post.match(/,(?!,).*\}/)) {
+        rewrites++;
+        str = m.pre + '{' + m.body + escClose + m.post;
+        // The rewritten string is expanded as if it were a fresh top-level one,
+        // so start a new empty-drop run: anchor the baseline at what `acc`
+        // holds now, and let the next expanding group decide whether to drop.
+        isTop = true
+        firstGroup = true
+        dropEmpties = false
+        accBase = []
+        for (var b = 0; b < acc.length; b++) {
+          accBase.push(acc[b].length)
+        }
+        continue
+      }
+      // Nothing here expands, so the whole remaining string is literal.
+      return combine(
+        acc,
+        accBase,
+        pre + '{' + m.body + '}' + m.post,
+        [''],
+        max,
+        maxLength,
+        dropEmpties,
+        []
+      )
+    }
 
-  if (isSequence) {
-    var x = numeric(n[0]);
-    var y = numeric(n[1]);
-    var width = Math.max(n[0].length, n[1].length)
-    var incr = n.length == 3
-      ? Math.abs(numeric(n[2]))
-      : 1;
-    var test = lte;
-    var reverse = y < x;
-    if (reverse) {
-      incr *= -1;
-      test = gte;
+    if (firstGroup) {
+      dropEmpties = isTop && !isSequence
+      firstGroup = false
     }
-    var pad = n.some(isPadded);
 
-    N = [];
+    var values;
+    if (isSequence) {
+      values = expandSequence(m.body, isAlphaSequence, max, maxLength);
+    } else {
+      var n = parseCommaParts(m.body);
+      if (n.length === 1 && n[0] !== undefined) {
+        // x{{a,b}}y ==> x{a}y x{b}y
+        n = expand(n[0], max, maxLength, maxDepth, depth + 1, maxRewrites, false).map(embrace);
+        //XXX is this necessary? Can't seem to hit it in tests.
+        /* c8 ignore start */
+        if (n.length === 1) {
+          nextBase = []
+          acc = combine(
+            acc,
+            accBase,
+            pre + n[0],
+            [''],
+            max,
+            maxLength,
+            dropEmpties && !m.post.length,
+            nextBase
+          )
+          accBase = nextBase
+          if (!m.post.length) break
+          str = m.post
+          continue
+        }
+        /* c8 ignore stop */
+      }
 
-    for (var i = x; test(i, y); i += incr) {
-      var c;
-      if (isAlphaSequence) {
-        c = String.fromCharCode(i);
-        if (c === '\\')
-          c = '';
-      } else {
-        c = String(i);
-        if (pad) {
-          var need = width - c.length;
-          if (need > 0) {
-            var z = new Array(need + 1).join('0');
-            if (i < 0)
-              c = '-' + z + c.slice(1);
-            else
-              c = z + c;
+      // Values that `combine` is going to drop as empty produce no result, so
+      // they must not count against `max` - otherwise `{a,,b}` with `max: 2`
+      // would stop at `['a', '']` and yield one result instead of two. Skipping
+      // them outright keeps `values` bounded while leaving `max` a bound on
+      // *kept* results. A value is dropped when it adds nothing past the
+      // baseline, which is what `combine` tests.
+      var dropsEmpties = dropEmpties && !m.post.length && !pre
+      for (var d = 0; dropsEmpties && d < acc.length; d++) {
+        if (acc[d].length !== accBase[d]) {
+          dropsEmpties = false
+        }
+      }
+
+      values = []
+      var valuesLength = 0
+      outer: for (var j = 0; j < n.length; j++) {
+        var expanded = expand(n[j], max, maxLength, maxDepth, depth + 1, maxRewrites, false)
+        for (var k = 0; k < expanded.length; k++) {
+          var v = expanded[k]
+          if (dropsEmpties && !v) continue
+          if (values.length >= max || valuesLength + v.length > maxLength) {
+            break outer
           }
+          values.push(v)
+          valuesLength += v.length
         }
       }
-      N.push(c);
     }
-  } else {
-    N = concatMap(n, function(el) { return expand(el, false) });
-  }
 
-  for (var j = 0; j < N.length; j++) {
-    for (var k = 0; k < post.length; k++) {
-      var expansion = pre + N[j] + post[k];
-      if (!isTop || isSequence || expansion)
-        expansions.push(expansion);
-    }
+    nextBase = []
+    acc = combine(
+      acc,
+      accBase,
+      pre,
+      values,
+      max,
+      maxLength,
+      dropEmpties && !m.post.length,
+      nextBase
+    )
+    accBase = nextBase
+    if (!m.post.length) break
+    str = m.post
   }
 
-  return expansions;
+  return acc
 }
 
 
-
 /***/ }),
 
 /***/ 7087:
@@ -14109,11 +14346,77 @@ class Request {
     }
   }
 
-  onUpgrade (statusCode, headers, socket) {
+  /**
+   * @param {number|null} statusCode
+   * @param {Buffer[]|null} headers
+   * @param {import('node:stream').Duplex} socket
+   * @param {string} [statusText]
+   */
+  onUpgrade (statusCode, headers, socket, statusText = '') {
+    this.onFinally()
+
     assert(!this.aborted)
     assert(!this.completed)
 
-    return this[kHandler].onUpgrade(statusCode, headers, socket)
+    if (statusCode !== null) {
+      this.#publishUpgradeHeaders(statusCode, headers, statusText)
+    }
+
+    const result = this[kHandler].onUpgrade(statusCode, headers, socket)
+
+    if (!this.aborted) {
+      this.completed = true
+      if (statusCode !== null) {
+        this.#publishUpgradeTrailers()
+      }
+    }
+
+    return result
+  }
+
+  /**
+   * @param {number} statusCode
+   * @param {import('node:http2').IncomingHttpHeaders} headers
+   * @param {(headers: import('node:http2').IncomingHttpHeaders) => Buffer[]} parseHeaders
+   * @param {string} [statusText]
+   */
+  onUpgradeResponse (statusCode, headers, parseHeaders, statusText = '') {
+    assert(!this.aborted)
+    assert(this.completed)
+
+    if (channels.headers.hasSubscribers) {
+      this.#publishUpgradeHeaders(statusCode, parseHeaders(headers), statusText)
+    }
+    this.#publishUpgradeTrailers()
+  }
+
+  /**
+   * @param {Error} error
+   */
+  onUpgradeError (error) {
+    assert(!this.aborted)
+    assert(this.completed)
+
+    if (channels.error.hasSubscribers) {
+      channels.error.publish({ request: this, error })
+    }
+  }
+
+  /**
+   * @param {number} statusCode
+   * @param {Buffer[]} headers
+   * @param {string} statusText
+   */
+  #publishUpgradeHeaders (statusCode, headers, statusText) {
+    if (channels.headers.hasSubscribers) {
+      channels.headers.publish({ request: this, response: { statusCode, headers, statusText } })
+    }
+  }
+
+  #publishUpgradeTrailers () {
+    if (channels.trailers.hasSubscribers) {
+      channels.trailers.publish({ request: this, trailers: [] })
+    }
   }
 
   onComplete (trailers) {
@@ -14196,7 +14499,13 @@ function processHeader (request, key, val) {
       } else if (typeof val[i] === 'object') {
         throw new InvalidArgumentError(`invalid ${key} header`)
       } else {
-        arr.push(`${val[i]}`)
+        // Coerce primitives (and reject unsafe coercions such as functions
+        // with a crafted toString/Symbol.toPrimitive).
+        const str = `${val[i]}`
+        if (!isValidHeaderValue(str)) {
+          throw new InvalidArgumentError(`invalid ${key} header`)
+        }
+        arr.push(str)
       }
     }
     val = arr
@@ -14207,7 +14516,12 @@ function processHeader (request, key, val) {
   } else if (val === null) {
     val = ''
   } else {
+    // Coerce primitives (and reject unsafe coercions such as functions
+    // with a crafted toString/Symbol.toPrimitive).
     val = `${val}`
+    if (!isValidHeaderValue(val)) {
+      throw new InvalidArgumentError(`invalid ${key} header`)
+    }
   }
 
   if (headerName === 'host') {
@@ -15240,7 +15554,7 @@ function defaultFactory (origin, opts) {
 }
 
 class Agent extends DispatcherBase {
-  constructor ({ factory = defaultFactory, maxRedirections = 0, connect, ...options } = {}) {
+  constructor ({ factory = defaultFactory, maxRedirections = 0, connect, tls, ...options } = {}) {
     if (typeof factory !== 'function') {
       throw new InvalidArgumentError('factory must be a function.')
     }
@@ -15259,11 +15573,15 @@ class Agent extends DispatcherBase {
       connect = { ...connect }
     }
 
+    if (tls && typeof tls !== 'function') {
+      tls = { ...tls }
+    }
+
     this[kInterceptors] = options.interceptors?.Agent && Array.isArray(options.interceptors.Agent)
       ? options.interceptors.Agent
       : [createRedirectInterceptor({ maxRedirections })]
 
-    this[kOptions] = { ...util.deepClone(options), connect }
+    this[kOptions] = { ...util.deepClone(options), connect, tls }
     this[kOptions].interceptors = options.interceptors
       ? { ...options.interceptors }
       : undefined
@@ -15579,6 +15897,7 @@ const {
   RequestContentLengthMismatchError,
   ResponseContentLengthMismatchError,
   RequestAbortedError,
+  InvalidArgumentError,
   HeadersTimeoutError,
   HeadersOverflowError,
   SocketError,
@@ -16000,7 +16319,7 @@ class Parser {
   }
 
   onUpgrade (head) {
-    const { upgrade, client, socket, headers, statusCode } = this
+    const { upgrade, client, socket, headers, statusCode, statusText } = this
 
     assert(upgrade)
     assert(client[kSocket] === socket)
@@ -16035,9 +16354,10 @@ class Parser {
     client.emit('disconnect', client[kUrl], [client], new InformationalError('upgrade'))
 
     try {
-      request.onUpgrade(statusCode, headers, socket)
-    } catch (err) {
-      util.destroy(socket, err)
+      request.onUpgrade(statusCode, headers, socket, statusText)
+    } catch (error) {
+      util.errorRequest(client, request, error)
+      util.destroy(socket, error)
     }
 
     client[kResume]()
@@ -16294,8 +16614,6 @@ async function connectH1 (client, socket) {
   socket[kParser] = new Parser(client, socket, llhttpInstance)
 
   addListener(socket, 'error', function (err) {
-    assert(err.code !== 'ERR_TLS_CERT_ALTNAME_INVALID')
-
     const parser = this[kParser]
 
     // On Mac OS, we get an ECONNRESET even if there is a full body to be forwarded
@@ -16444,7 +16762,7 @@ async function connectH1 (client, socket) {
 
 function clearIdleSocketValidation (socket) {
   if (socket[kIdleSocketValidationTimeout]) {
-    clearTimeout(socket[kIdleSocketValidationTimeout])
+    clearImmediate(socket[kIdleSocketValidationTimeout])
     socket[kIdleSocketValidationTimeout] = null
   }
 
@@ -16453,15 +16771,23 @@ function clearIdleSocketValidation (socket) {
 
 function scheduleIdleSocketValidation (client, socket) {
   socket[kIdleSocketValidation] = 1
-  socket[kIdleSocketValidationTimeout] = setTimeout(() => {
+  // Yield to the check phase (after poll) so unsolicited bytes / FIN / RST
+  // already pending on this idle keep-alive socket are processed before the
+  // next request is written (GHSA-35p6-xmwp-9g52).
+  //
+  // setTimeout(0) pays Node's ~1ms timer floor on every sequential reuse
+  // (#5493). setImmediate avoids that, but an *unref'd* Immediate lets poll
+  // block for ~500ms when the event loop is otherwise idle (#5600 / #5606).
+  // A ref'd Immediate both keeps the pending request alive and makes poll
+  // return immediately — the hybrid those issues asked for.
+  socket[kIdleSocketValidationTimeout] = setImmediate(() => {
     socket[kIdleSocketValidationTimeout] = null
     socket[kIdleSocketValidation] = 2
 
     if (client[kSocket] === socket && !socket.destroyed) {
       client[kResume]()
     }
-  }, 0)
-  socket[kIdleSocketValidationTimeout].unref?.()
+  })
 }
 
 /**
@@ -16562,8 +16888,16 @@ function writeH1 (client, request) {
     }
     body = bodyStream.stream
     contentLength = bodyStream.length
-  } else if (util.isBlobLike(body) && request.contentType == null && body.type) {
-    headers.push('content-type', body.type)
+  } else if (util.isBlobLike(body) && request.contentType == null) {
+    const contentType = body.type
+    if (contentType) {
+      const contentTypeValue = `${contentType}`
+      if (!util.isValidHeaderValue(contentTypeValue)) {
+        util.errorRequest(client, request, new InvalidArgumentError('invalid content-type header'))
+        return false
+      }
+      headers.push('content-type', contentTypeValue)
+    }
   }
 
   if (body && typeof body.read === 'function') {
@@ -16602,12 +16936,22 @@ function writeH1 (client, request) {
   const socket = client[kSocket]
   clearIdleSocketValidation(socket)
 
-  const abort = (err) => {
-    if (request.aborted || request.completed) {
+  /**
+   * @param {Error} [error]
+   */
+  const abort = (error) => {
+    if (request.aborted) {
+      return
+    }
+
+    if (request.completed) {
+      if (request.upgrade || request.method === 'CONNECT') {
+        util.destroy(socket, new InformationalError('aborted'))
+      }
       return
     }
 
-    util.errorRequest(client, request, err || new RequestAbortedError())
+    util.errorRequest(client, request, error || new RequestAbortedError())
 
     util.destroy(body)
     util.destroy(socket, new InformationalError('aborted'))
@@ -17064,6 +17408,7 @@ module.exports = connectH1
 
 
 const assert = __nccwpck_require__(4589)
+const { errorMonitor } = __nccwpck_require__(8474)
 const { pipeline } = __nccwpck_require__(7075)
 const util = __nccwpck_require__(3440)
 const {
@@ -17140,6 +17485,15 @@ function parseH2Headers (headers) {
   return result
 }
 
+/**
+ * @param {import('node:http2').IncomingHttpHeaders} headers
+ * @returns {Buffer[]}
+ */
+function parseH2ResponseHeaders (headers) {
+  const { [HTTP2_HEADER_STATUS]: _statusCode, ...realHeaders } = headers
+  return parseH2Headers(realHeaders)
+}
+
 async function connectH2 (client, socket) {
   client[kSocket] = socket
 
@@ -17189,8 +17543,6 @@ async function connectH2 (client, socket) {
   socket[kHTTP2Session] = session
 
   util.addListener(socket, 'error', function (err) {
-    assert(err.code !== 'ERR_TLS_CERT_ALTNAME_INVALID')
-
     this[kError] = err
 
     this[kClient][kOnError](err)
@@ -17264,8 +17616,6 @@ function resumeH2 (client) {
 }
 
 function onHttp2SessionError (err) {
-  assert(err.code !== 'ERR_TLS_CERT_ALTNAME_INVALID')
-
   this[kSocket][kError] = err
   this[kClient][kOnError](err)
 }
@@ -17360,22 +17710,32 @@ function writeH2 (client, request) {
   headers[HTTP2_HEADER_AUTHORITY] = host || `${hostname}${port ? `:${port}` : ''}`
   headers[HTTP2_HEADER_METHOD] = method
 
-  const abort = (err) => {
-    if (request.aborted || request.completed) {
+  /**
+   * @param {Error} [error]
+   */
+  const abort = (error) => {
+    if (request.aborted) {
+      return
+    }
+
+    if (request.completed) {
+      if (method === 'CONNECT' && stream != null) {
+        util.destroy(stream, error || new RequestAbortedError())
+      }
       return
     }
 
-    err = err || new RequestAbortedError()
+    error = error || new RequestAbortedError()
 
-    util.errorRequest(client, request, err)
+    util.errorRequest(client, request, error)
 
     if (stream != null) {
-      util.destroy(stream, err)
+      util.destroy(stream, error)
     }
 
     // We do not destroy the socket as we can continue using the session
     // the stream get's destroyed and the session remains to create new streams
-    util.destroy(body, err)
+    util.destroy(body, error)
     client[kQueue][client[kRunningIdx]++] = null
     client[kResume]()
   }
@@ -17394,25 +17754,57 @@ function writeH2 (client, request) {
 
   if (method === 'CONNECT') {
     session.ref()
-    // We are already connected, streams are pending, first request
-    // will create a new stream. We trigger a request to create the stream and wait until
-    // `ready` event is triggered
     // We disabled endStream to allow the user to write to the stream
     stream = session.request(headers, { endStream: false, signal })
+    let upgradeResponseFinished = false
 
-    if (stream.id && !stream.pending) {
-      request.onUpgrade(null, null, stream)
-      ++session[kOpenStreams]
-      client[kQueue][client[kRunningIdx]++] = null
-    } else {
-      stream.once('ready', () => {
+    /**
+     * @param {import('node:http2').IncomingHttpHeaders} headers
+     */
+    const onResponse = (headers) => {
+      upgradeResponseFinished = true
+      stream.off(errorMonitor, onUpgradeError)
+      request.onUpgradeResponse(Number(headers[HTTP2_HEADER_STATUS]), headers, parseH2ResponseHeaders)
+    }
+
+    /**
+     * @param {Error} error
+     */
+    const onUpgradeError = (error) => {
+      upgradeResponseFinished = true
+      stream.off('response', onResponse)
+      request.onUpgradeError(error)
+    }
+
+    const onReady = () => {
+      try {
         request.onUpgrade(null, null, stream)
-        ++session[kOpenStreams]
-        client[kQueue][client[kRunningIdx]++] = null
-      })
+      } catch (error) {
+        stream.off('response', onResponse)
+        abort(error)
+        return
+      }
+
+      if (request.aborted) {
+        return
+      }
+
+      stream.off('error', abort)
+      stream.once(errorMonitor, onUpgradeError)
+      client[kQueue][client[kRunningIdx]++] = null
     }
 
+    stream.once('response', onResponse)
+    stream.once('error', abort)
+    ++session[kOpenStreams]
+    onReady()
+
     stream.once('close', () => {
+      if (!upgradeResponseFinished && request.completed) {
+        stream.off('response', onResponse)
+        stream.off(errorMonitor, onUpgradeError)
+        request.onUpgradeError(new InformationalError(`HTTP/2: "stream error" received - code ${stream.rstCode}`))
+      }
       session[kOpenStreams] -= 1
       if (session[kOpenStreams] === 0) session.unref()
     })
@@ -17921,9 +18313,10 @@ class Client extends DispatcherBase {
     // h2
     maxConcurrentStreams,
     allowH2,
-    webSocket
+    webSocket,
+    eventSource
   } = {}) {
-    super({ webSocket })
+    super({ webSocket, eventSource })
 
     if (keepAlive !== undefined) {
       throw new InvalidArgumentError('unsupported keepAlive, use pipelining=0 instead')
@@ -18444,6 +18837,7 @@ module.exports = Client
 
 
 
+const buffer = __nccwpck_require__(4573)
 const Dispatcher = __nccwpck_require__(883)
 const {
   ClientDestroyedError,
@@ -18456,6 +18850,7 @@ const kOnDestroyed = Symbol('onDestroyed')
 const kOnClosed = Symbol('onClosed')
 const kInterceptedDispatch = Symbol('Intercepted Dispatch')
 const kWebSocketOptions = Symbol('webSocketOptions')
+const kEventSourceOptions = Symbol('eventSourceOptions')
 
 class DispatcherBase extends Dispatcher {
   constructor (opts) {
@@ -18466,6 +18861,7 @@ class DispatcherBase extends Dispatcher {
     this[kClosed] = false
     this[kOnClosed] = []
     this[kWebSocketOptions] = opts?.webSocket ?? {}
+    this[kEventSourceOptions] = opts?.eventSource ?? {}
   }
 
   get webSocketOptions () {
@@ -18475,6 +18871,12 @@ class DispatcherBase extends Dispatcher {
     }
   }
 
+  get eventSourceOptions () {
+    return {
+      maxEventSize: this[kEventSourceOptions].maxEventSize ?? buffer.kStringMaxLength
+    }
+  }
+
   get destroyed () {
     return this[kDestroyed]
   }
@@ -20036,6 +20438,28 @@ function calculateRetryAfterHeader (retryAfter) {
   return new Date(retryAfter).getTime() - current
 }
 
+function validatePartialResponseContentLength (headers, range, statusCode, retryCount) {
+  const contentLength = headers['content-length']
+  if (contentLength == null) {
+    return null
+  }
+
+  if (!Number.isFinite(range.start) || !Number.isFinite(range.end)) {
+    return null
+  }
+
+  const length = Number(contentLength)
+  const expectedLength = range.end - range.start + 1
+  if (!Number.isFinite(length) || length !== expectedLength) {
+    return new RequestRetryError('Content-Length mismatch', statusCode, {
+      headers,
+      data: { count: retryCount }
+    })
+  }
+
+  return null
+}
+
 class RetryHandler {
   constructor (opts, handlers) {
     const { retryOptions, ...dispatchOpts } = opts
@@ -20089,6 +20513,7 @@ class RetryHandler {
     this.end = null
     this.etag = null
     this.resume = null
+    this.headersSent = false
 
     // Handle possible onConnect duplication
     this.handler.onConnect(reason => {
@@ -20101,6 +20526,20 @@ class RetryHandler {
     })
   }
 
+  checkpointResponseEnd (headers, resume) {
+    if (this.end == null && this.opts.method !== 'HEAD') {
+      const contentLength = headers['content-length']
+      this.end = contentLength != null ? Number(contentLength) - 1 : null
+
+      assert(
+        this.end == null || Number.isFinite(this.end),
+        'invalid content-length'
+      )
+    }
+
+    this.resume = this.end != null ? resume : null
+  }
+
   onRequestSent () {
     if (this.handler.onRequestSent) {
       this.handler.onRequestSent()
@@ -20189,7 +20628,12 @@ class RetryHandler {
     this.retryCount += 1
 
     if (statusCode >= 300) {
-      if (this.retryOpts.statusCodes.includes(statusCode) === false) {
+      // Only expose a response if no earlier attempt has reached the caller.
+      // Otherwise abort this attempt so the error settles the existing body
+      // instead of replacing it with a new response.
+      if (!this.headersSent && this.retryOpts.statusCodes.includes(statusCode) === false) {
+        this.headersSent = true
+        this.checkpointResponseEnd(headers, resume)
         return this.handler.onHeaders(
           statusCode,
           rawHeaders,
@@ -20250,10 +20694,23 @@ class RetryHandler {
         return false
       }
 
+      const contentLengthError = validatePartialResponseContentLength(headers, contentRange, statusCode, this.retryCount)
+      if (contentLengthError != null) {
+        this.abort(contentLengthError)
+        return false
+      }
+
       const { start, size, end = size - 1 } = contentRange
 
-      assert(this.start === start, 'content-range mismatch')
-      assert(this.end == null || this.end === end, 'content-range mismatch')
+      if (this.start !== start || (this.end != null && this.end !== end)) {
+        this.abort(
+          new RequestRetryError('Content-Range mismatch', statusCode, {
+            headers,
+            data: { count: this.retryCount }
+          })
+        )
+        return false
+      }
 
       this.resume = resume
       return true
@@ -20265,6 +20722,7 @@ class RetryHandler {
         const range = parseRangeHeader(headers['content-range'])
 
         if (range == null) {
+          this.headersSent = true
           return this.handler.onHeaders(
             statusCode,
             rawHeaders,
@@ -20273,6 +20731,12 @@ class RetryHandler {
           )
         }
 
+        const contentLengthError = validatePartialResponseContentLength(headers, range, statusCode, this.retryCount)
+        if (contentLengthError != null) {
+          this.abort(contentLengthError)
+          return false
+        }
+
         const { start, size, end = size - 1 } = range
         assert(
           start != null && Number.isFinite(start),
@@ -20297,6 +20761,7 @@ class RetryHandler {
       )
 
       this.resume = resume
+      this.headersSent = true
       this.etag = headers.etag != null ? headers.etag : null
 
       // Weak etags are not useful for comparison nor cache
@@ -20336,7 +20801,7 @@ class RetryHandler {
   }
 
   onError (err) {
-    if (this.aborted || isDisturbed(this.opts.body)) {
+    if (this.aborted || isDisturbed(this.opts.body) || (this.headersSent && this.resume == null)) {
       return this.handler.onError(err)
     }
 
@@ -24517,7 +24982,7 @@ function validateCookiePath (path) {
 
     if (
       code < 0x20 || // exclude CTLs (0-31)
-      code === 0x7F || // DEL
+      code > 0x7E || // exclude DEL and non-ascii
       code === 0x3B // ;
     ) {
       throw new Error('Invalid cookie path')
@@ -24526,16 +24991,80 @@ function validateCookiePath (path) {
 }
 
 /**
- * I have no idea why these values aren't allowed to be honest,
- * but Deno tests these. - Khafra
+ * <let-dig> ::= <letter> | <digit>
+ *
+ * <letter> ::= any one of the 52 alphabetic characters A through Z in
+ * upper case and a through z in lower case
+ *
+ * <digit> ::= any one of the ten digits 0 through 9r
+ *
+ * @see https://www.rfc-editor.org/rfc/rfc1034#section-3.5
+ * @param {number} code
+ */
+function isLetterOrDigit (code) {
+  return (
+    (code >= 0x30 && code <= 0x39) || // 0-9
+    (code >= 0x41 && code <= 0x5A) || // A-Z
+    (code >= 0x61 && code <= 0x7A) // a-z
+  )
+}
+
+/**
+ * Validates a cookie domain against the "preferred name syntax".
+ *
+ * <domain>      ::= <subdomain> | " "
+ * <subdomain>   ::= <label> | <subdomain> "." <label>
+ * <label>       ::= <let-dig> [ [ <ldh-str> ] <let-dig> ]
+ * <ldh-str>     ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
+ * <let-dig-hyp> ::= <let-dig> | "-"
+ *
+ * @see https://www.rfc-editor.org/rfc/rfc1034#section-3.5
+ * @see https://www.rfc-editor.org/rfc/rfc1123#section-2.1
+ * @see https://www.rfc-editor.org/rfc/rfc1035#section-2.3.4
  * @param {string} domain
  */
 function validateCookieDomain (domain) {
-  if (
-    domain.startsWith('-') ||
-    domain.endsWith('.') ||
-    domain.endsWith('-')
-  ) {
+  // <domain> ::= <subdomain> | " "
+  if (domain === ' ') {
+    return
+  }
+
+  if (domain.length > 255) {
+    throw new Error('Invalid cookie domain')
+  }
+
+  let labelLength = 0
+
+  for (let i = 0; i < domain.length; ++i) {
+    const code = domain.charCodeAt(i)
+
+    if (code === 0x2E) {
+      if (labelLength === 0) {
+        throw new Error('Invalid cookie domain')
+      }
+
+      if (domain.charCodeAt(i - 1) === 0x2D) { // "-"
+        throw new Error('Invalid cookie domain')
+      }
+
+      labelLength = 0
+      continue
+    }
+
+    if (labelLength === 0 && !isLetterOrDigit(code)) {
+      throw new Error('Invalid cookie domain')
+    }
+
+    if (!isLetterOrDigit(code) && code !== 0x2D) { // "-"
+      throw new Error('Invalid cookie domain')
+    }
+
+    if (++labelLength > 63) {
+      throw new Error('Invalid cookie domain')
+    }
+  }
+
+  if (labelLength === 0 || domain.charCodeAt(domain.length - 1) === 0x2D) { // "-"
     throw new Error('Invalid cookie domain')
   }
 }
@@ -24678,7 +25207,13 @@ function stringify (cookie) {
 
     const [key, ...value] = part.split('=')
 
-    out.push(`${key.trim()}=${value.join('=')}`)
+    const trimmedKey = key.trim()
+    const joinedValue = value.join('=')
+
+    validateCookieName(trimmedKey)
+    validateCookieValue(joinedValue)
+
+    out.push(`${trimmedKey}=${joinedValue}`)
   }
 
   return out.join('; ')
@@ -24700,6 +25235,7 @@ module.exports = {
 /***/ ((module, __unused_webpack_exports, __nccwpck_require__) => {
 
 
+const buffer = __nccwpck_require__(4573)
 const { Transform } = __nccwpck_require__(7075)
 const { isASCIINumber, isValidLastEventId } = __nccwpck_require__(4811)
 
@@ -24724,6 +25260,63 @@ const COLON = 0x3A
  */
 const SPACE = 0x20
 
+const defaultMaxEventSize = buffer.kStringMaxLength
+
+const DATA = Buffer.from('data')
+const EVENT = Buffer.from('event')
+const ID = Buffer.from('id')
+const RETRY = Buffer.from('retry')
+
+// Each data field creates a string node, and each unconsumed input chunk keeps
+// a Buffer wrapper. The absolute ceiling protects the large default byte limit.
+const minParserItems = 1024
+const maxParserItems = 131072
+const bytesPerParserItem = 128
+
+function isASCIINumberBytes (buffer, start) {
+  if (start >= buffer.length) {
+    return false
+  }
+
+  for (let i = start; i < buffer.length; i++) {
+    if (buffer[i] < 0x30 || buffer[i] > 0x39) {
+      return false
+    }
+  }
+
+  return true
+}
+
+function isValidLastEventIdBytes (buffer, start) {
+  for (let i = start; i < buffer.length; i++) {
+    if (buffer[i] === 0x00) {
+      return false
+    }
+  }
+
+  return true
+}
+
+function isFieldName (line, length, field) {
+  if (length !== field.length) {
+    return false
+  }
+
+  for (let i = 0; i < length; i++) {
+    if (line[i] !== field[i]) {
+      return false
+    }
+  }
+
+  return true
+}
+
+function createMaxEventSizeExceededError () {
+  const error = new Error('EventSource message size exceeded')
+  error.aborted = false
+  return error
+}
+
 /**
  * @typedef {object} EventSourceStreamEvent
  * @type {object}
@@ -24764,11 +25357,21 @@ class EventSourceStream extends Transform {
   eventEndCheck = false
 
   /**
-   * @type {Buffer}
+   * @type {Buffer[]}
    */
-  buffer = null
+  chunks = []
 
+  chunkIndex = 0
   pos = 0
+  lineChunkIndex = 0
+  linePos = 0
+  lineLength = 0
+  eventSize = 0
+  eventFieldSizes = { data: 0, event: 0, id: 0, retry: 0 }
+  dataLineCount = 0
+  maxEventSize
+  maxDataLines
+  maxBufferedChunks
 
   event = {
     data: undefined,
@@ -24779,6 +25382,7 @@ class EventSourceStream extends Transform {
 
   /**
    * @param {object} options
+   * @param {number} [options.maxEventSize]
    * @param {eventSourceSettings} options.eventSourceSettings
    * @param {Function} [options.push]
    */
@@ -24790,6 +25394,12 @@ class EventSourceStream extends Transform {
     super(options)
 
     this.state = options.eventSourceSettings || {}
+    this.maxEventSize = options.maxEventSize ?? defaultMaxEventSize
+    const parserItemLimit = this.maxEventSize > 0
+      ? Math.min(maxParserItems, Math.max(minParserItems, Math.floor(this.maxEventSize / bytesPerParserItem)))
+      : 0
+    this.maxDataLines = parserItemLimit
+    this.maxBufferedChunks = parserItemLimit
     if (options.push) {
       this.push = options.push
     }
@@ -24807,92 +25417,28 @@ class EventSourceStream extends Transform {
       return
     }
 
-    // Cache the chunk in the buffer, as the data might not be complete while
-    // processing it
-    // TODO: Investigate if there is a more performant way to handle
-    // incoming chunks
-    // see: https://github.com/nodejs/undici/issues/2630
-    if (this.buffer) {
-      this.buffer = Buffer.concat([this.buffer, chunk])
-    } else {
-      this.buffer = chunk
+    // A leading line ending can immediately release the currently buffered
+    // line, even when it uses the final allowed chunk slot.
+    if (this.maxEventSize > 0 &&
+        this.chunks.length >= this.maxBufferedChunks &&
+        chunk[0] !== LF && chunk[0] !== CR) {
+      callback(createMaxEventSizeExceededError())
+      return
     }
+    this.chunks.push(chunk)
 
     // Strip leading byte-order-mark if we opened the stream and started
     // the processing of the incoming data
     if (this.checkBOM) {
-      switch (this.buffer.length) {
-        case 1:
-          // Check if the first byte is the same as the first byte of the BOM
-          if (this.buffer[0] === BOM[0]) {
-            // If it is, we need to wait for more data
-            callback()
-            return
-          }
-          // Set the checkBOM flag to false as we don't need to check for the
-          // BOM anymore
-          this.checkBOM = false
-
-          // The buffer only contains one byte so we need to wait for more data
-          callback()
-          return
-        case 2:
-          // Check if the first two bytes are the same as the first two bytes
-          // of the BOM
-          if (
-            this.buffer[0] === BOM[0] &&
-            this.buffer[1] === BOM[1]
-          ) {
-            // If it is, we need to wait for more data, because the third byte
-            // is needed to determine if it is the BOM or not
-            callback()
-            return
-          }
-
-          // Set the checkBOM flag to false as we don't need to check for the
-          // BOM anymore
-          this.checkBOM = false
-          break
-        case 3:
-          // Check if the first three bytes are the same as the first three
-          // bytes of the BOM
-          if (
-            this.buffer[0] === BOM[0] &&
-            this.buffer[1] === BOM[1] &&
-            this.buffer[2] === BOM[2]
-          ) {
-            // If it is, we can drop the buffered data, as it is only the BOM
-            this.buffer = Buffer.alloc(0)
-            // Set the checkBOM flag to false as we don't need to check for the
-            // BOM anymore
-            this.checkBOM = false
-
-            // Await more data
-            callback()
-            return
-          }
-          // If it is not the BOM, we can start processing the data
-          this.checkBOM = false
-          break
-        default:
-          // The buffer is longer than 3 bytes, so we can drop the BOM if it is
-          // present
-          if (
-            this.buffer[0] === BOM[0] &&
-            this.buffer[1] === BOM[1] &&
-            this.buffer[2] === BOM[2]
-          ) {
-            // Remove the BOM from the buffer
-            this.buffer = this.buffer.subarray(3)
-          }
-
-          // Set the checkBOM flag to false as we don't need to check for the
-          this.checkBOM = false
-          break
+      if (this.handleBOM()) {
+        callback()
+        return
       }
     }
 
-    while (this.pos < this.buffer.length) {
+    while (this.hasCurrentByte()) {
+      const byte = this.currentByte()
+
       // If the previous line ended with an end-of-line, we need to check
       // if the next character is also an end-of-line.
       if (this.eventEndCheck) {
@@ -24905,10 +25451,9 @@ class EventSourceStream extends Transform {
         if (this.crlfCheck) {
           // If the current character is a line feed, we can remove it
           // from the buffer and reset the crlfCheck flag
-          if (this.buffer[this.pos] === LF) {
-            this.buffer = this.buffer.subarray(this.pos + 1)
-            this.pos = 0
+          if (byte === LF) {
             this.crlfCheck = false
+            this.consumeCurrentByte()
 
             // It is possible that the line feed is not the end of the
             // event. We need to check if the next character is an
@@ -24924,19 +25469,17 @@ class EventSourceStream extends Transform {
           this.crlfCheck = false
         }
 
-        if (this.buffer[this.pos] === LF || this.buffer[this.pos] === CR) {
+        if (byte === LF || byte === CR) {
           // If the current character is a carriage return, we need to
           // set the crlfCheck flag to true, as we need to check if the
           // next character is a line feed so we can remove it from the
           // buffer
-          if (this.buffer[this.pos] === CR) {
+          if (byte === CR) {
             this.crlfCheck = true
           }
 
-          this.buffer = this.buffer.subarray(this.pos + 1)
-          this.pos = 0
-          if (
-            this.event.data !== undefined || this.event.event || this.event.id || this.event.retry) {
+          this.consumeCurrentByte()
+          if (this.hasPendingEvent()) {
             this.processEvent(this.event)
           }
           this.clearEvent()
@@ -24950,22 +25493,23 @@ class EventSourceStream extends Transform {
 
       // If the current character is an end-of-line, we can process the
       // line
-      if (this.buffer[this.pos] === LF || this.buffer[this.pos] === CR) {
+      if (byte === LF || byte === CR) {
         // If the current character is a carriage return, we need to
         // set the crlfCheck flag to true, as we need to check if the
         // next character is a line feed
-        if (this.buffer[this.pos] === CR) {
+        if (byte === CR) {
           this.crlfCheck = true
         }
 
         // In any case, we can process the line as we reached an
         // end-of-line character
-        this.parseLine(this.buffer.subarray(0, this.pos), this.event)
-
-        // Remove the processed line from the buffer
-        this.buffer = this.buffer.subarray(this.pos + 1)
-        // Reset the position as we removed the processed line from the buffer
-        this.pos = 0
+        try {
+          this.parseLine(this.readLine(), this.event)
+        } catch (error) {
+          callback(error)
+          return
+        }
+        this.consumeCurrentByte()
         // A line was processed and this could be the end of the event. We need
         // to check if the next line is empty to determine if the event is
         // finished.
@@ -24973,15 +25517,28 @@ class EventSourceStream extends Transform {
         continue
       }
 
-      this.pos++
+      // readLine() is only called after CR or LF. Reject an unfinished line
+      // before it can retain an unbounded number of decoded chunks. The seven
+      // extra bytes allow the longest field prefix ("event: " or "retry: ").
+      if (this.maxEventSize > 0 && ++this.lineLength > this.maxEventSize + 7) {
+        callback(createMaxEventSizeExceededError())
+        return
+      }
+      this.advanceCursor()
     }
 
     callback()
   }
 
+  _destroy (error, callback) {
+    this.chunks.length = 0
+    this.clearEvent()
+    super._destroy(error, callback)
+  }
+
   /**
    * @param {Buffer} line
-   * @param {EventStreamEvent} event
+   * @param {EventSourceStreamEvent} event
    */
   parseLine (line, event) {
     // If the line is empty (a blank line)
@@ -24998,65 +25555,72 @@ class EventSourceStream extends Transform {
       return
     }
 
-    let field = ''
-    let value = ''
+    let fieldLength = line.length
+    let valueStart = line.length
 
     // If the line contains a U+003A COLON character (:)
     if (colonPosition !== -1) {
-      // Collect the characters on the line before the first U+003A COLON
-      // character (:), and let field be that string.
-      // TODO: Investigate if there is a more performant way to extract the
-      // field
-      // see: https://github.com/nodejs/undici/issues/2630
-      field = line.subarray(0, colonPosition).toString('utf8')
+      fieldLength = colonPosition
 
       // Collect the characters on the line after the first U+003A COLON
       // character (:), and let value be that string.
       // If value starts with a U+0020 SPACE character, remove it from value.
-      let valueStart = colonPosition + 1
+      valueStart = colonPosition + 1
       if (line[valueStart] === SPACE) {
         ++valueStart
       }
-      // TODO: Investigate if there is a more performant way to extract the
-      // value
-      // see: https://github.com/nodejs/undici/issues/2630
-      value = line.subarray(valueStart).toString('utf8')
+    }
+
+    if (isFieldName(line, fieldLength, DATA)) {
+      if (this.maxEventSize > 0 && this.dataLineCount >= this.maxDataLines) {
+        throw createMaxEventSizeExceededError()
+      }
+      const valueBytes = line.length - valueStart
+      const dataSize = this.eventFieldSizes.data + (event.data === undefined ? 0 : 1) + valueBytes
+      this.setEventFieldSize('data', dataSize)
 
-      // Otherwise, the string is not empty but does not contain a U+003A COLON
-      // character (:)
-    } else {
-      // Process the field using the steps described below, using the whole
-      // line as the field name, and the empty string as the field value.
-      field = line.toString('utf8')
-      value = ''
-    }
-
-    // Modify the event with the field name and value. The value is also
-    // decoded as UTF-8
-    switch (field) {
-      case 'data':
-        if (event[field] === undefined) {
-          event[field] = value
-        } else {
-          event[field] += `\n${value}`
-        }
-        break
-      case 'retry':
-        if (isASCIINumber(value)) {
-          event[field] = value
-        }
-        break
-      case 'id':
-        if (isValidLastEventId(value)) {
-          event[field] = value
-        }
-        break
-      case 'event':
-        if (value.length > 0) {
-          event[field] = value
-        }
-        break
+      const value = line.toString('utf8', valueStart)
+
+      if (event.data === undefined) {
+        event.data = value
+      } else {
+        event.data += `\n${value}`
+      }
+      this.dataLineCount++
+      return
+    }
+
+    if (isFieldName(line, fieldLength, RETRY)) {
+      if (isASCIINumberBytes(line, valueStart)) {
+        this.setEventFieldSize('retry', line.length - valueStart)
+        event.retry = line.toString('utf8', valueStart)
+      }
+      return
+    }
+
+    if (isFieldName(line, fieldLength, ID)) {
+      if (isValidLastEventIdBytes(line, valueStart)) {
+        this.setEventFieldSize('id', line.length - valueStart)
+        event.id = line.toString('utf8', valueStart)
+      }
+      return
+    }
+
+    if (isFieldName(line, fieldLength, EVENT)) {
+      if (valueStart < line.length) {
+        this.setEventFieldSize('event', line.length - valueStart)
+        event.event = line.toString('utf8', valueStart)
+      }
+    }
+  }
+
+  setEventFieldSize (field, size) {
+    const eventSize = this.eventSize - this.eventFieldSizes[field] + size
+    if (this.maxEventSize > 0 && eventSize > this.maxEventSize) {
+      throw createMaxEventSizeExceededError()
     }
+    this.eventSize = eventSize
+    this.eventFieldSizes[field] = size
   }
 
   /**
@@ -25085,13 +25649,160 @@ class EventSourceStream extends Transform {
   }
 
   clearEvent () {
-    this.event = {
-      data: undefined,
-      event: undefined,
-      id: undefined,
-      retry: undefined
+    this.event.data = undefined
+    this.event.event = undefined
+    this.event.id = undefined
+    this.event.retry = undefined
+    this.eventSize = 0
+    this.dataLineCount = 0
+    this.eventFieldSizes.data = 0
+    this.eventFieldSizes.event = 0
+    this.eventFieldSizes.id = 0
+    this.eventFieldSizes.retry = 0
+  }
+
+  hasPendingEvent () {
+    return this.event.data !== undefined ||
+      this.event.event !== undefined ||
+      this.event.id !== undefined ||
+      this.event.retry !== undefined
+  }
+
+  hasCurrentByte () {
+    return this.chunkIndex < this.chunks.length &&
+      this.pos < this.chunks[this.chunkIndex].length
+  }
+
+  currentByte () {
+    return this.chunks[this.chunkIndex][this.pos]
+  }
+
+  consumeCurrentByte () {
+    this.advanceCursor()
+    this.syncLineStartToCursor()
+  }
+
+  advanceCursor () {
+    this.pos++
+
+    while (this.chunkIndex < this.chunks.length && this.pos >= this.chunks[this.chunkIndex].length) {
+      this.chunkIndex++
+      this.pos = 0
     }
   }
+
+  syncLineStartToCursor () {
+    this.lineChunkIndex = this.chunkIndex
+    this.linePos = this.pos
+    this.lineLength = 0
+    this.dropConsumedChunks()
+  }
+
+  dropConsumedChunks () {
+    if (this.lineChunkIndex > 0) {
+      const consumed = this.lineChunkIndex
+      this.chunks.splice(0, consumed)
+      this.lineChunkIndex = 0
+      this.chunkIndex -= consumed
+    }
+
+    if (this.chunkIndex === this.chunks.length) {
+      this.chunks.length = 0
+      this.chunkIndex = 0
+      this.pos = 0
+      this.lineChunkIndex = 0
+      this.linePos = 0
+    }
+  }
+
+  readLine () {
+    if (this.lineChunkIndex === this.chunkIndex) {
+      return this.chunks[this.chunkIndex].subarray(this.linePos, this.pos)
+    }
+
+    const chunks = []
+    let length = 0
+
+    for (let i = this.lineChunkIndex; i <= this.chunkIndex; i++) {
+      const chunk = this.chunks[i]
+      const start = i === this.lineChunkIndex ? this.linePos : 0
+      const end = i === this.chunkIndex ? this.pos : chunk.length
+      const slice = chunk.subarray(start, end)
+      length += slice.length
+      chunks.push(slice)
+    }
+
+    return Buffer.concat(chunks, length)
+  }
+
+  peekBufferedByte (offset) {
+    let chunkIndex = this.lineChunkIndex
+    let pos = this.linePos
+
+    while (chunkIndex < this.chunks.length) {
+      const chunk = this.chunks[chunkIndex]
+      const remaining = chunk.length - pos
+
+      if (offset < remaining) {
+        return chunk[pos + offset]
+      }
+
+      offset -= remaining
+      chunkIndex++
+      pos = 0
+    }
+  }
+
+  discardLeadingBytes (count) {
+    while (count > 0 && this.lineChunkIndex < this.chunks.length) {
+      const chunk = this.chunks[this.lineChunkIndex]
+      const remaining = chunk.length - this.linePos
+
+      if (count < remaining) {
+        this.linePos += count
+        count = 0
+      } else {
+        count -= remaining
+        this.lineChunkIndex++
+        this.linePos = 0
+      }
+    }
+
+    this.chunkIndex = this.lineChunkIndex
+    this.pos = this.linePos
+    this.dropConsumedChunks()
+  }
+
+  handleBOM () {
+    const first = this.peekBufferedByte(0)
+    const second = this.peekBufferedByte(1)
+    const third = this.peekBufferedByte(2)
+
+    if (second === undefined) {
+      if (first === BOM[0]) {
+        return true
+      }
+
+      this.checkBOM = false
+      return true
+    }
+
+    if (third === undefined) {
+      if (first === BOM[0] && second === BOM[1]) {
+        return true
+      }
+
+      this.checkBOM = false
+      return false
+    }
+
+    if (first === BOM[0] && second === BOM[1] && third === BOM[2]) {
+      this.discardLeadingBytes(3)
+    }
+
+    this.checkBOM = false
+    return !this.hasCurrentByte()
+  }
 }
 
 module.exports = {
@@ -25117,6 +25828,7 @@ const { isNetworkError } = __nccwpck_require__(9051)
 const { delay } = __nccwpck_require__(4811)
 const { kEnumerableProperty } = __nccwpck_require__(3440)
 const { environmentSettingsObject } = __nccwpck_require__(3168)
+const { getGlobalDispatcher } = __nccwpck_require__(2581)
 
 let experimentalWarned = false
 
@@ -25398,6 +26110,7 @@ class EventSource extends EventTarget {
 
       const eventSourceStream = new EventSourceStream({
         eventSourceSettings: this.#state,
+        maxEventSize: this.#dispatcher.eventSourceOptions?.maxEventSize,
         push: (event) => {
           this.dispatchEvent(createFastMessageEvent(
             event.type,
@@ -25576,7 +26289,8 @@ webidl.converters.EventSourceInitDict = webidl.dictionaryConverter([
   },
   {
     key: 'dispatcher', // undici only
-    converter: webidl.converters.any
+    converter: webidl.converters.any,
+    defaultValue: () => getGlobalDispatcher()
   }
 ])
 
@@ -30672,8 +31386,10 @@ async function httpNetworkFetch (
   // 19. Run these steps in parallel:
 
   //    1. Run these steps, but abort when fetchParams is canceled:
-  fetchParams.controller.onAborted = onAborted
-  fetchParams.controller.on('terminated', onAborted)
+  if (!fetchParams.controller.resume) {
+    fetchParams.controller.on('terminated', onAborted)
+  }
+
   fetchParams.controller.resume = async () => {
     // 1. While true
     while (true) {
@@ -30842,8 +31558,6 @@ async function httpNetworkFetch (
           }
           location = headersList.get('location', true)
 
-          this.body = new Readable({ read: resume })
-
           const decoders = []
 
           const willFollow = location && request.redirect === 'follow' &&
@@ -30861,7 +31575,7 @@ async function httpNetworkFetch (
             // CVE fix similar to urllib3 (GHSA-gm62-xv2j-4w53) and curl (CVE-2022-32206).
             const maxContentEncodings = 5
             if (codings.length > maxContentEncodings) {
-              reject(new Error(`too many content-encodings in response: ${codings.length}, maximum allowed is ${maxContentEncodings}`))
+              this.abort(new Error(`too many content-encodings in response: ${codings.length}, maximum allowed is ${maxContentEncodings}`))
               return true
             }
 
@@ -30894,6 +31608,8 @@ async function httpNetworkFetch (
             }
           }
 
+          this.body = new Readable({ read: resume })
+
           const onError = this.onError.bind(this)
 
           resolve({
@@ -30940,10 +31656,6 @@ async function httpNetworkFetch (
             fetchParams.controller.off('terminated', this.abort)
           }
 
-          if (fetchParams.controller.onAborted) {
-            fetchParams.controller.off('terminated', fetchParams.controller.onAborted)
-          }
-
           fetchParams.controller.ended = true
 
           this.body.push(null)
@@ -36359,7 +37071,7 @@ function establishWebSocketConnection (url, protocols, client, ws, onEstablish,
         // is specified, the server needs to include the same field and one of
         // the selected subprotocol values in its response for the connection to
         // be established.
-        if (!requestProtocols.includes(secProtocol)) {
+        if (requestProtocols === null || !requestProtocols.includes(secProtocol)) {
           failWebsocketConnection(ws, 'Protocol was not set in the opening handshake.')
           return
         }
@@ -37120,7 +37832,12 @@ class PerMessageDeflate {
 
         if (this.#maxPayloadSize > 0 && this.#inflate[kLength] > this.#maxPayloadSize) {
           callback(new MessageSizeExceededError())
+          // The inflater may still hold buffered input that can emit a late
+          // zlib error. Remove the data listener, then deterministically stop
+          // the stream so a subsequent 'error' cannot fire without a listener
+          // (which would terminate the process as an unhandled error event).
           this.#inflate.removeAllListeners()
+          this.#inflate.destroy()
           this.#inflate = null
           return
         }
@@ -37413,6 +38130,20 @@ class ByteParser extends Writable {
         if (isControlFrame(this.#info.opcode)) {
           this.#loop = this.parseControlFrame(body)
           this.#state = parserStates.INFO
+
+          // If the automatic PONG/CLOSE reply filled the socket's write buffer,
+          // stop parsing and resume on drain so a PING flood cannot grow the
+          // outbound queue without bound.
+          const socket = this.ws[kResponse].socket
+          if (this.#loop && socket.writableNeedDrain) {
+            this.#loop = false
+            socket.once('drain', () => {
+              if (this.destroyed) return
+              this.#loop = true
+              this.run(callback)
+            })
+            return
+          }
         } else {
           if (!this.#info.compressed) {
             if (!this.writeFragments(body)) {
diff --git a/dist/save-only/index.js b/dist/save-only/index.js
index 1b81de3..f8c0ef0 100644
--- a/dist/save-only/index.js
+++ b/dist/save-only/index.js
@@ -8001,6 +8001,40 @@ var escClose = '\0CLOSE'+Math.random()+'\0';
 var escComma = '\0COMMA'+Math.random()+'\0';
 var escPeriod = '\0PERIOD'+Math.random()+'\0';
 
+var EXPANSION_MAX = 100000
+
+// `EXPANSION_MAX` caps the *number* of expansions, but not their length. An
+// input like `'{a,b}'.repeat(1500)` stays under that count - its output is
+// truncated to 100k results - while making every result ~1500 characters
+// long. The result set, and the intermediate arrays built while combining
+// brace sets, then grow large enough to exhaust memory and crash the process
+// (CVE-2026-14257). `EXPANSION_MAX_LENGTH` bounds the total number of
+// characters the accumulator may hold at any point, so memory stays flat no
+// matter how many brace groups are chained. The limit sits well above any
+// realistic expansion (100k results hitting `EXPANSION_MAX` measure ~1M
+// characters) so legitimate input is unaffected.
+var EXPANSION_MAX_LENGTH = 4000000
+
+// `expand` recurses once per level of brace *nesting* - both when expanding a
+// set's comma members and when re-wrapping a set whose body is a single part.
+// The CVE-2026-14257 fix made the *tail* iterative (recursion on `m.post`, one
+// level per chained group), which left nesting depth unbounded: about 3,100
+// levels of `{{{...a,b...}}}` - only ~6KB of input - exhausted the native stack
+// and crashed the process. `EXPANSION_MAX_DEPTH` bounds how deep the parser
+// will follow nesting. It sits far above any realistic pattern and well below
+// the depth at which the stack runs out.
+var EXPANSION_MAX_DEPTH = 1000
+
+// Bash keeps a quirk where a brace group followed by a comma set still expands
+// (`{a},b}`). The parser implements it by rewriting the string and restarting
+// the scan, absorbing one `}` per pass. `n` trailing braces therefore cost `n`
+// full passes over a string that itself grows by one `escClose` sentinel each
+// time - quadratic in `n`, with a ~26x constant from the sentinel's length.
+// 128KB of `'{a}' + '}'.repeat(n) + ',z}'` blocked the event loop for 27
+// seconds to produce two results. `EXPANSION_MAX_REWRITES` bounds how many
+// times the scan may restart. Real `{a},b}` input needs a handful.
+var EXPANSION_MAX_REWRITES = 1000
+
 function numeric(str) {
   return parseInt(str, 10) == str
     ? parseInt(str, 10)
@@ -8024,40 +8058,66 @@ function unescapeBraces(str) {
 }
 
 
+// Like `target.push(...items)` but doesn't overflow the stack
+function pushAll(target, items) {
+  for (var i = 0; i < items.length; i++) {
+    target.push(items[i]);
+  }
+}
+
 // Basically just str.split(","), but handling cases
 // where we have nested braced sections, which should be
 // treated as individual members, like {a,{b,c},d}
 function parseCommaParts(str) {
-  if (!str)
-    return [''];
-
   var parts = [];
-  var m = balanced('{', '}', str);
 
-  if (!m)
-    return str.split(',');
+  // Walk the brace groups iteratively. Recursing on `post` once per group let a
+  // chain of them exhaust the stack - the parsing-side counterpart to
+  // the `expand` overflow fixed for CVE-2026-14257, and not something `max` or
+  // `maxLength` can bound, since it happens before expansion.
+  //
+  // The part the next chunk continues
+  var carry = '';
 
-  var pre = m.pre;
-  var body = m.body;
-  var post = m.post;
-  var p = pre.split(',');
+  for (;;) {
+    var m = balanced('{', '}', str);
 
-  p[p.length-1] += '{' + body + '}';
-  var postParts = parseCommaParts(post);
-  if (post.length) {
-    p[p.length-1] += postParts.shift();
-    p.push.apply(p, postParts);
-  }
+    if (!m) {
+      var tail = str.split(',');
+      tail[0] = carry + tail[0];
+      pushAll(parts, tail);
+      return parts;
+    }
 
-  parts.push.apply(parts, p);
+    var pre = m.pre;
+    var body = m.body;
+    var post = m.post;
+    var p = pre.split(',');
+
+    p[0] = carry + p[0];
+    p[p.length-1] += '{' + body + '}';
+
+    if (!post.length) {
+      pushAll(parts, p);
+      return parts;
+    }
 
-  return parts;
+    carry = p.pop();
+    pushAll(parts, p);
+    str = post;
+  }
 }
 
-function expandTop(str) {
+function expandTop(str, options) {
   if (!str)
     return [];
 
+  options = options || {};
+  var max = options.max == null ? EXPANSION_MAX : options.max;
+  var maxLength = options.maxLength == null ? EXPANSION_MAX_LENGTH : options.maxLength;
+  var maxDepth = options.maxDepth == null ? EXPANSION_MAX_DEPTH : options.maxDepth;
+  var maxRewrites = options.maxRewrites == null ? EXPANSION_MAX_REWRITES : options.maxRewrites;
+
   // I don't know why Bash 4.3 does this, but it does.
   // Anything starting with {} will have the first two bytes preserved
   // but *only* at the top level, so {},a}b will not expand to anything,
@@ -8068,7 +8128,7 @@ function expandTop(str) {
     str = '\\{\\}' + str.substr(2);
   }
 
-  return expand(escapeBraces(str), true).map(unescapeBraces);
+  return expand(escapeBraces(str), max, maxLength, maxDepth, 0, maxRewrites, true).map(unescapeBraces);
 }
 
 function identity(e) {
@@ -8089,110 +8149,287 @@ function gte(i, y) {
   return i >= y;
 }
 
-function expand(str, isTop) {
-  var expansions = [];
-
-  var m = balanced('{', '}', str);
-  if (!m || /\$$/.test(m.pre)) return [str];
-
-  var isNumericSequence = /^-?\d+\.\.-?\d+(?:\.\.-?\d+)?$/.test(m.body);
-  var isAlphaSequence = /^[a-zA-Z]\.\.[a-zA-Z](?:\.\.-?\d+)?$/.test(m.body);
-  var isSequence = isNumericSequence || isAlphaSequence;
-  var isOptions = m.body.indexOf(',') >= 0;
-  if (!isSequence && !isOptions) {
-    // {a},b}
-    if (m.post.match(/,(?!,).*\}/)) {
-      str = m.pre + '{' + m.body + escClose + m.post;
-      return expand(str);
+// Build `{ acc[a] + pre + values[v] }` for every combination, capping the
+// number of results at `max` and the total number of characters at `maxLength`.
+// This is the one place output grows, so bounding it here keeps the single
+// accumulator - and therefore memory - flat regardless of how many brace groups
+// are combined (CVE-2026-14257).
+//
+// `base[a]` is the length of the part of `acc[a]` that predates the current
+// empty-drop baseline (see `expand`). The matching baselines for the results
+// are appended to `outBase`, which the caller carries forward alongside them.
+function combine(
+  acc,
+  base,
+  pre,
+  values,
+  max,
+  maxLength,
+  dropEmpties,
+  outBase
+) {
+  var out = []
+  var length = 0
+  for (var a = 0; a < acc.length; a++) {
+    for (var v = 0; v < values.length; v++) {
+      if (out.length >= max) return out
+      var expansion = acc[a] + pre + values[v]
+      // Bash drops empty results at the top level. Skip them before they count
+      // against `max`, so `max` bounds the number of *kept* results. "Empty"
+      // means "adds nothing past the baseline", not "empty overall".
+      if (dropEmpties && expansion.length === base[a]) continue
+      if (length + expansion.length > maxLength) return out
+      out.push(expansion)
+      outBase.push(base[a])
+      length += expansion.length
     }
-    return [str];
   }
+  return out
+}
 
-  var n;
-  if (isSequence) {
-    n = m.body.split(/\.\./);
-  } else {
-    n = parseCommaParts(m.body);
-    if (n.length === 1) {
-      // x{{a,b}}y ==> x{a}y x{b}y
-      n = expand(n[0], false).map(embrace);
-      if (n.length === 1) {
-        var post = m.post.length
-          ? expand(m.post, false)
-          : [''];
-        return post.map(function(p) {
-          return m.pre + n[0] + p;
-        });
+// The expansion values of a single numeric (`1..5`) or alphabetic (`a..e..2`)
+// sequence body.
+function expandSequence(
+  body,
+  isAlphaSequence,
+  max,
+  maxLength
+) {
+  var n = body.split(/\.\./)
+  var N = []
+  // A sequence body always splits into two or three parts, but the compiler
+  // can't know that.
+  /* c8 ignore start */
+  if (n[0] === undefined || n[1] === undefined) {
+    return N
+  }
+  /* c8 ignore stop */
+  var x = numeric(n[0])
+  var y = numeric(n[1])
+  var width = Math.max(n[0].length, n[1].length)
+  var incr =
+    n.length === 3 && n[2] !== undefined ?
+      Math.max(Math.abs(numeric(n[2])), 1)
+    : 1
+  var test = lte
+  var reverse = y < x
+  if (reverse) {
+    incr *= -1
+    test = gte
+  }
+  var pad = n.some(isPadded)
+
+  var length = 0
+  for (var i = x; test(i, y) && N.length < max; i += incr) {
+    var c
+    if (isAlphaSequence) {
+      c = String.fromCharCode(i)
+      if (c === '\\') {
+        c = ''
+      }
+    } else {
+      c = String(i)
+      if (pad) {
+        var need = width - c.length
+        if (need > 0) {
+          var z = new Array(need + 1).join('0')
+          if (i < 0) {
+            c = '-' + z + c.slice(1)
+          } else {
+            c = z + c
+          }
+        }
       }
     }
+    if (length + c.length > maxLength) break
+    N.push(c)
+    length += c.length
   }
+  return N
+}
 
-  // at this point, n is the parts, and we know it's not a comma set
-  // with a single entry.
+function expand(
+  str,
+  max,
+  maxLength,
+  maxDepth,
+  depth,
+  maxRewrites,
+  isTop
+) {
+  // Too deeply nested to keep following: treat the rest as literal, the same
+  // way a group that cannot expand is already handled. Truncating rather than
+  // throwing keeps expansion total, matching `max` and `maxLength`.
+  if (depth > maxDepth) {
+    return [str];
+  }
 
-  // no need to expand pre, since it is guaranteed to be free of brace-sets
-  var pre = m.pre;
-  var post = m.post.length
-    ? expand(m.post, false)
-    : [''];
+  // Consume the string's top-level brace groups left to right, threading a
+  // running set of combined prefixes (`acc`). Expanding the tail iteratively -
+  // rather than recursing on `m.post` once per group - keeps the native stack
+  // depth constant, so deeply chained input (`'{a,b}'.repeat(3000)`) can no
+  // longer overflow the stack, and leaves a single accumulator whose size
+  // `maxLength` bounds directly (CVE-2026-14257).
+  var acc = ['']
 
-  var N;
+  // Bash drops empty results, but only when the *first* group of the run is a
+  // comma set - a sequence like `{a..\}` may legitimately yield ''. The drop
+  // is on the final strings, so it is applied to whichever `combine` produces
+  // them (the one with no brace set left in the tail).
+  //
+  // The old implementation recursed on `m.post`, so the drop tested only the
+  // expansion of the current call's substring. The `{a},b}` rewrite below turns
+  // `isTop` back on part-way through a string, starting a fresh such run, so
+  // the drop must ignore whatever `acc` already holds from earlier groups.
+  // `accBase[a]` records how much of `acc[a]` predates the current run;
+  // `combine` treats an expansion as empty when it adds nothing past that.
+  var accBase = [0]
+  // How many times the `{a},b}` rewrite below has restarted the scan. Each pass
+  // re-reads the whole string, so leaving this unbounded is quadratic.
+  var rewrites = 0
+  var dropEmpties = false
+  var firstGroup = true
+  var nextBase
+
+  for (;;) {
+    var m = balanced('{', '}', str);
+
+    // No brace set left: the rest of the string is literal.
+    if (!m) {
+      return combine(acc, accBase, str, [''], max, maxLength, dropEmpties, [])
+    }
+
+    // no need to expand pre, since it is guaranteed to be free of brace-sets
+    var pre = m.pre;
+
+    // For compatibility reasons, `${` is not eligible for brace expansion, and
+    // on the 1.x line it suppresses expansion of the rest of the string too:
+    // the whole remainder is literal. The 2.x and 5.x lines instead keep
+    // expanding the tail, which is what bash does, but changing that here would
+    // be a breaking change for 1.x consumers. Routed through `combine` so the
+    // result is still bounded by `max` and `maxLength`.
+    if (/\$$/.test(pre)) {
+      return combine(acc, accBase, str, [''], max, maxLength, dropEmpties, [])
+    }
+
+    var isNumericSequence = /^-?\d+\.\.-?\d+(?:\.\.-?\d+)?$/.test(m.body);
+    var isAlphaSequence = /^[a-zA-Z]\.\.[a-zA-Z](?:\.\.-?\d+)?$/.test(m.body);
+    var isSequence = isNumericSequence || isAlphaSequence;
+    var isOptions = m.body.indexOf(',') >= 0;
+    if (!isSequence && !isOptions) {
+      // {a},b}
+      if (rewrites < maxRewrites && m.post.match(/,(?!,).*\}/)) {
+        rewrites++;
+        str = m.pre + '{' + m.body + escClose + m.post;
+        // The rewritten string is expanded as if it were a fresh top-level one,
+        // so start a new empty-drop run: anchor the baseline at what `acc`
+        // holds now, and let the next expanding group decide whether to drop.
+        isTop = true
+        firstGroup = true
+        dropEmpties = false
+        accBase = []
+        for (var b = 0; b < acc.length; b++) {
+          accBase.push(acc[b].length)
+        }
+        continue
+      }
+      // Nothing here expands, so the whole remaining string is literal.
+      return combine(
+        acc,
+        accBase,
+        pre + '{' + m.body + '}' + m.post,
+        [''],
+        max,
+        maxLength,
+        dropEmpties,
+        []
+      )
+    }
 
-  if (isSequence) {
-    var x = numeric(n[0]);
-    var y = numeric(n[1]);
-    var width = Math.max(n[0].length, n[1].length)
-    var incr = n.length == 3
-      ? Math.abs(numeric(n[2]))
-      : 1;
-    var test = lte;
-    var reverse = y < x;
-    if (reverse) {
-      incr *= -1;
-      test = gte;
+    if (firstGroup) {
+      dropEmpties = isTop && !isSequence
+      firstGroup = false
     }
-    var pad = n.some(isPadded);
 
-    N = [];
+    var values;
+    if (isSequence) {
+      values = expandSequence(m.body, isAlphaSequence, max, maxLength);
+    } else {
+      var n = parseCommaParts(m.body);
+      if (n.length === 1 && n[0] !== undefined) {
+        // x{{a,b}}y ==> x{a}y x{b}y
+        n = expand(n[0], max, maxLength, maxDepth, depth + 1, maxRewrites, false).map(embrace);
+        //XXX is this necessary? Can't seem to hit it in tests.
+        /* c8 ignore start */
+        if (n.length === 1) {
+          nextBase = []
+          acc = combine(
+            acc,
+            accBase,
+            pre + n[0],
+            [''],
+            max,
+            maxLength,
+            dropEmpties && !m.post.length,
+            nextBase
+          )
+          accBase = nextBase
+          if (!m.post.length) break
+          str = m.post
+          continue
+        }
+        /* c8 ignore stop */
+      }
 
-    for (var i = x; test(i, y); i += incr) {
-      var c;
-      if (isAlphaSequence) {
-        c = String.fromCharCode(i);
-        if (c === '\\')
-          c = '';
-      } else {
-        c = String(i);
-        if (pad) {
-          var need = width - c.length;
-          if (need > 0) {
-            var z = new Array(need + 1).join('0');
-            if (i < 0)
-              c = '-' + z + c.slice(1);
-            else
-              c = z + c;
+      // Values that `combine` is going to drop as empty produce no result, so
+      // they must not count against `max` - otherwise `{a,,b}` with `max: 2`
+      // would stop at `['a', '']` and yield one result instead of two. Skipping
+      // them outright keeps `values` bounded while leaving `max` a bound on
+      // *kept* results. A value is dropped when it adds nothing past the
+      // baseline, which is what `combine` tests.
+      var dropsEmpties = dropEmpties && !m.post.length && !pre
+      for (var d = 0; dropsEmpties && d < acc.length; d++) {
+        if (acc[d].length !== accBase[d]) {
+          dropsEmpties = false
+        }
+      }
+
+      values = []
+      var valuesLength = 0
+      outer: for (var j = 0; j < n.length; j++) {
+        var expanded = expand(n[j], max, maxLength, maxDepth, depth + 1, maxRewrites, false)
+        for (var k = 0; k < expanded.length; k++) {
+          var v = expanded[k]
+          if (dropsEmpties && !v) continue
+          if (values.length >= max || valuesLength + v.length > maxLength) {
+            break outer
           }
+          values.push(v)
+          valuesLength += v.length
         }
       }
-      N.push(c);
     }
-  } else {
-    N = concatMap(n, function(el) { return expand(el, false) });
-  }
 
-  for (var j = 0; j < N.length; j++) {
-    for (var k = 0; k < post.length; k++) {
-      var expansion = pre + N[j] + post[k];
-      if (!isTop || isSequence || expansion)
-        expansions.push(expansion);
-    }
+    nextBase = []
+    acc = combine(
+      acc,
+      accBase,
+      pre,
+      values,
+      max,
+      maxLength,
+      dropEmpties && !m.post.length,
+      nextBase
+    )
+    accBase = nextBase
+    if (!m.post.length) break
+    str = m.post
   }
 
-  return expansions;
+  return acc
 }
 
 
-
 /***/ }),
 
 /***/ 7087:
@@ -14109,11 +14346,77 @@ class Request {
     }
   }
 
-  onUpgrade (statusCode, headers, socket) {
+  /**
+   * @param {number|null} statusCode
+   * @param {Buffer[]|null} headers
+   * @param {import('node:stream').Duplex} socket
+   * @param {string} [statusText]
+   */
+  onUpgrade (statusCode, headers, socket, statusText = '') {
+    this.onFinally()
+
     assert(!this.aborted)
     assert(!this.completed)
 
-    return this[kHandler].onUpgrade(statusCode, headers, socket)
+    if (statusCode !== null) {
+      this.#publishUpgradeHeaders(statusCode, headers, statusText)
+    }
+
+    const result = this[kHandler].onUpgrade(statusCode, headers, socket)
+
+    if (!this.aborted) {
+      this.completed = true
+      if (statusCode !== null) {
+        this.#publishUpgradeTrailers()
+      }
+    }
+
+    return result
+  }
+
+  /**
+   * @param {number} statusCode
+   * @param {import('node:http2').IncomingHttpHeaders} headers
+   * @param {(headers: import('node:http2').IncomingHttpHeaders) => Buffer[]} parseHeaders
+   * @param {string} [statusText]
+   */
+  onUpgradeResponse (statusCode, headers, parseHeaders, statusText = '') {
+    assert(!this.aborted)
+    assert(this.completed)
+
+    if (channels.headers.hasSubscribers) {
+      this.#publishUpgradeHeaders(statusCode, parseHeaders(headers), statusText)
+    }
+    this.#publishUpgradeTrailers()
+  }
+
+  /**
+   * @param {Error} error
+   */
+  onUpgradeError (error) {
+    assert(!this.aborted)
+    assert(this.completed)
+
+    if (channels.error.hasSubscribers) {
+      channels.error.publish({ request: this, error })
+    }
+  }
+
+  /**
+   * @param {number} statusCode
+   * @param {Buffer[]} headers
+   * @param {string} statusText
+   */
+  #publishUpgradeHeaders (statusCode, headers, statusText) {
+    if (channels.headers.hasSubscribers) {
+      channels.headers.publish({ request: this, response: { statusCode, headers, statusText } })
+    }
+  }
+
+  #publishUpgradeTrailers () {
+    if (channels.trailers.hasSubscribers) {
+      channels.trailers.publish({ request: this, trailers: [] })
+    }
   }
 
   onComplete (trailers) {
@@ -14196,7 +14499,13 @@ function processHeader (request, key, val) {
       } else if (typeof val[i] === 'object') {
         throw new InvalidArgumentError(`invalid ${key} header`)
       } else {
-        arr.push(`${val[i]}`)
+        // Coerce primitives (and reject unsafe coercions such as functions
+        // with a crafted toString/Symbol.toPrimitive).
+        const str = `${val[i]}`
+        if (!isValidHeaderValue(str)) {
+          throw new InvalidArgumentError(`invalid ${key} header`)
+        }
+        arr.push(str)
       }
     }
     val = arr
@@ -14207,7 +14516,12 @@ function processHeader (request, key, val) {
   } else if (val === null) {
     val = ''
   } else {
+    // Coerce primitives (and reject unsafe coercions such as functions
+    // with a crafted toString/Symbol.toPrimitive).
     val = `${val}`
+    if (!isValidHeaderValue(val)) {
+      throw new InvalidArgumentError(`invalid ${key} header`)
+    }
   }
 
   if (headerName === 'host') {
@@ -15240,7 +15554,7 @@ function defaultFactory (origin, opts) {
 }
 
 class Agent extends DispatcherBase {
-  constructor ({ factory = defaultFactory, maxRedirections = 0, connect, ...options } = {}) {
+  constructor ({ factory = defaultFactory, maxRedirections = 0, connect, tls, ...options } = {}) {
     if (typeof factory !== 'function') {
       throw new InvalidArgumentError('factory must be a function.')
     }
@@ -15259,11 +15573,15 @@ class Agent extends DispatcherBase {
       connect = { ...connect }
     }
 
+    if (tls && typeof tls !== 'function') {
+      tls = { ...tls }
+    }
+
     this[kInterceptors] = options.interceptors?.Agent && Array.isArray(options.interceptors.Agent)
       ? options.interceptors.Agent
       : [createRedirectInterceptor({ maxRedirections })]
 
-    this[kOptions] = { ...util.deepClone(options), connect }
+    this[kOptions] = { ...util.deepClone(options), connect, tls }
     this[kOptions].interceptors = options.interceptors
       ? { ...options.interceptors }
       : undefined
@@ -15579,6 +15897,7 @@ const {
   RequestContentLengthMismatchError,
   ResponseContentLengthMismatchError,
   RequestAbortedError,
+  InvalidArgumentError,
   HeadersTimeoutError,
   HeadersOverflowError,
   SocketError,
@@ -16000,7 +16319,7 @@ class Parser {
   }
 
   onUpgrade (head) {
-    const { upgrade, client, socket, headers, statusCode } = this
+    const { upgrade, client, socket, headers, statusCode, statusText } = this
 
     assert(upgrade)
     assert(client[kSocket] === socket)
@@ -16035,9 +16354,10 @@ class Parser {
     client.emit('disconnect', client[kUrl], [client], new InformationalError('upgrade'))
 
     try {
-      request.onUpgrade(statusCode, headers, socket)
-    } catch (err) {
-      util.destroy(socket, err)
+      request.onUpgrade(statusCode, headers, socket, statusText)
+    } catch (error) {
+      util.errorRequest(client, request, error)
+      util.destroy(socket, error)
     }
 
     client[kResume]()
@@ -16294,8 +16614,6 @@ async function connectH1 (client, socket) {
   socket[kParser] = new Parser(client, socket, llhttpInstance)
 
   addListener(socket, 'error', function (err) {
-    assert(err.code !== 'ERR_TLS_CERT_ALTNAME_INVALID')
-
     const parser = this[kParser]
 
     // On Mac OS, we get an ECONNRESET even if there is a full body to be forwarded
@@ -16444,7 +16762,7 @@ async function connectH1 (client, socket) {
 
 function clearIdleSocketValidation (socket) {
   if (socket[kIdleSocketValidationTimeout]) {
-    clearTimeout(socket[kIdleSocketValidationTimeout])
+    clearImmediate(socket[kIdleSocketValidationTimeout])
     socket[kIdleSocketValidationTimeout] = null
   }
 
@@ -16453,15 +16771,23 @@ function clearIdleSocketValidation (socket) {
 
 function scheduleIdleSocketValidation (client, socket) {
   socket[kIdleSocketValidation] = 1
-  socket[kIdleSocketValidationTimeout] = setTimeout(() => {
+  // Yield to the check phase (after poll) so unsolicited bytes / FIN / RST
+  // already pending on this idle keep-alive socket are processed before the
+  // next request is written (GHSA-35p6-xmwp-9g52).
+  //
+  // setTimeout(0) pays Node's ~1ms timer floor on every sequential reuse
+  // (#5493). setImmediate avoids that, but an *unref'd* Immediate lets poll
+  // block for ~500ms when the event loop is otherwise idle (#5600 / #5606).
+  // A ref'd Immediate both keeps the pending request alive and makes poll
+  // return immediately — the hybrid those issues asked for.
+  socket[kIdleSocketValidationTimeout] = setImmediate(() => {
     socket[kIdleSocketValidationTimeout] = null
     socket[kIdleSocketValidation] = 2
 
     if (client[kSocket] === socket && !socket.destroyed) {
       client[kResume]()
     }
-  }, 0)
-  socket[kIdleSocketValidationTimeout].unref?.()
+  })
 }
 
 /**
@@ -16562,8 +16888,16 @@ function writeH1 (client, request) {
     }
     body = bodyStream.stream
     contentLength = bodyStream.length
-  } else if (util.isBlobLike(body) && request.contentType == null && body.type) {
-    headers.push('content-type', body.type)
+  } else if (util.isBlobLike(body) && request.contentType == null) {
+    const contentType = body.type
+    if (contentType) {
+      const contentTypeValue = `${contentType}`
+      if (!util.isValidHeaderValue(contentTypeValue)) {
+        util.errorRequest(client, request, new InvalidArgumentError('invalid content-type header'))
+        return false
+      }
+      headers.push('content-type', contentTypeValue)
+    }
   }
 
   if (body && typeof body.read === 'function') {
@@ -16602,12 +16936,22 @@ function writeH1 (client, request) {
   const socket = client[kSocket]
   clearIdleSocketValidation(socket)
 
-  const abort = (err) => {
-    if (request.aborted || request.completed) {
+  /**
+   * @param {Error} [error]
+   */
+  const abort = (error) => {
+    if (request.aborted) {
+      return
+    }
+
+    if (request.completed) {
+      if (request.upgrade || request.method === 'CONNECT') {
+        util.destroy(socket, new InformationalError('aborted'))
+      }
       return
     }
 
-    util.errorRequest(client, request, err || new RequestAbortedError())
+    util.errorRequest(client, request, error || new RequestAbortedError())
 
     util.destroy(body)
     util.destroy(socket, new InformationalError('aborted'))
@@ -17064,6 +17408,7 @@ module.exports = connectH1
 
 
 const assert = __nccwpck_require__(4589)
+const { errorMonitor } = __nccwpck_require__(8474)
 const { pipeline } = __nccwpck_require__(7075)
 const util = __nccwpck_require__(3440)
 const {
@@ -17140,6 +17485,15 @@ function parseH2Headers (headers) {
   return result
 }
 
+/**
+ * @param {import('node:http2').IncomingHttpHeaders} headers
+ * @returns {Buffer[]}
+ */
+function parseH2ResponseHeaders (headers) {
+  const { [HTTP2_HEADER_STATUS]: _statusCode, ...realHeaders } = headers
+  return parseH2Headers(realHeaders)
+}
+
 async function connectH2 (client, socket) {
   client[kSocket] = socket
 
@@ -17189,8 +17543,6 @@ async function connectH2 (client, socket) {
   socket[kHTTP2Session] = session
 
   util.addListener(socket, 'error', function (err) {
-    assert(err.code !== 'ERR_TLS_CERT_ALTNAME_INVALID')
-
     this[kError] = err
 
     this[kClient][kOnError](err)
@@ -17264,8 +17616,6 @@ function resumeH2 (client) {
 }
 
 function onHttp2SessionError (err) {
-  assert(err.code !== 'ERR_TLS_CERT_ALTNAME_INVALID')
-
   this[kSocket][kError] = err
   this[kClient][kOnError](err)
 }
@@ -17360,22 +17710,32 @@ function writeH2 (client, request) {
   headers[HTTP2_HEADER_AUTHORITY] = host || `${hostname}${port ? `:${port}` : ''}`
   headers[HTTP2_HEADER_METHOD] = method
 
-  const abort = (err) => {
-    if (request.aborted || request.completed) {
+  /**
+   * @param {Error} [error]
+   */
+  const abort = (error) => {
+    if (request.aborted) {
+      return
+    }
+
+    if (request.completed) {
+      if (method === 'CONNECT' && stream != null) {
+        util.destroy(stream, error || new RequestAbortedError())
+      }
       return
     }
 
-    err = err || new RequestAbortedError()
+    error = error || new RequestAbortedError()
 
-    util.errorRequest(client, request, err)
+    util.errorRequest(client, request, error)
 
     if (stream != null) {
-      util.destroy(stream, err)
+      util.destroy(stream, error)
     }
 
     // We do not destroy the socket as we can continue using the session
     // the stream get's destroyed and the session remains to create new streams
-    util.destroy(body, err)
+    util.destroy(body, error)
     client[kQueue][client[kRunningIdx]++] = null
     client[kResume]()
   }
@@ -17394,25 +17754,57 @@ function writeH2 (client, request) {
 
   if (method === 'CONNECT') {
     session.ref()
-    // We are already connected, streams are pending, first request
-    // will create a new stream. We trigger a request to create the stream and wait until
-    // `ready` event is triggered
     // We disabled endStream to allow the user to write to the stream
     stream = session.request(headers, { endStream: false, signal })
+    let upgradeResponseFinished = false
 
-    if (stream.id && !stream.pending) {
-      request.onUpgrade(null, null, stream)
-      ++session[kOpenStreams]
-      client[kQueue][client[kRunningIdx]++] = null
-    } else {
-      stream.once('ready', () => {
+    /**
+     * @param {import('node:http2').IncomingHttpHeaders} headers
+     */
+    const onResponse = (headers) => {
+      upgradeResponseFinished = true
+      stream.off(errorMonitor, onUpgradeError)
+      request.onUpgradeResponse(Number(headers[HTTP2_HEADER_STATUS]), headers, parseH2ResponseHeaders)
+    }
+
+    /**
+     * @param {Error} error
+     */
+    const onUpgradeError = (error) => {
+      upgradeResponseFinished = true
+      stream.off('response', onResponse)
+      request.onUpgradeError(error)
+    }
+
+    const onReady = () => {
+      try {
         request.onUpgrade(null, null, stream)
-        ++session[kOpenStreams]
-        client[kQueue][client[kRunningIdx]++] = null
-      })
+      } catch (error) {
+        stream.off('response', onResponse)
+        abort(error)
+        return
+      }
+
+      if (request.aborted) {
+        return
+      }
+
+      stream.off('error', abort)
+      stream.once(errorMonitor, onUpgradeError)
+      client[kQueue][client[kRunningIdx]++] = null
     }
 
+    stream.once('response', onResponse)
+    stream.once('error', abort)
+    ++session[kOpenStreams]
+    onReady()
+
     stream.once('close', () => {
+      if (!upgradeResponseFinished && request.completed) {
+        stream.off('response', onResponse)
+        stream.off(errorMonitor, onUpgradeError)
+        request.onUpgradeError(new InformationalError(`HTTP/2: "stream error" received - code ${stream.rstCode}`))
+      }
       session[kOpenStreams] -= 1
       if (session[kOpenStreams] === 0) session.unref()
     })
@@ -17921,9 +18313,10 @@ class Client extends DispatcherBase {
     // h2
     maxConcurrentStreams,
     allowH2,
-    webSocket
+    webSocket,
+    eventSource
   } = {}) {
-    super({ webSocket })
+    super({ webSocket, eventSource })
 
     if (keepAlive !== undefined) {
       throw new InvalidArgumentError('unsupported keepAlive, use pipelining=0 instead')
@@ -18444,6 +18837,7 @@ module.exports = Client
 
 
 
+const buffer = __nccwpck_require__(4573)
 const Dispatcher = __nccwpck_require__(883)
 const {
   ClientDestroyedError,
@@ -18456,6 +18850,7 @@ const kOnDestroyed = Symbol('onDestroyed')
 const kOnClosed = Symbol('onClosed')
 const kInterceptedDispatch = Symbol('Intercepted Dispatch')
 const kWebSocketOptions = Symbol('webSocketOptions')
+const kEventSourceOptions = Symbol('eventSourceOptions')
 
 class DispatcherBase extends Dispatcher {
   constructor (opts) {
@@ -18466,6 +18861,7 @@ class DispatcherBase extends Dispatcher {
     this[kClosed] = false
     this[kOnClosed] = []
     this[kWebSocketOptions] = opts?.webSocket ?? {}
+    this[kEventSourceOptions] = opts?.eventSource ?? {}
   }
 
   get webSocketOptions () {
@@ -18475,6 +18871,12 @@ class DispatcherBase extends Dispatcher {
     }
   }
 
+  get eventSourceOptions () {
+    return {
+      maxEventSize: this[kEventSourceOptions].maxEventSize ?? buffer.kStringMaxLength
+    }
+  }
+
   get destroyed () {
     return this[kDestroyed]
   }
@@ -20036,6 +20438,28 @@ function calculateRetryAfterHeader (retryAfter) {
   return new Date(retryAfter).getTime() - current
 }
 
+function validatePartialResponseContentLength (headers, range, statusCode, retryCount) {
+  const contentLength = headers['content-length']
+  if (contentLength == null) {
+    return null
+  }
+
+  if (!Number.isFinite(range.start) || !Number.isFinite(range.end)) {
+    return null
+  }
+
+  const length = Number(contentLength)
+  const expectedLength = range.end - range.start + 1
+  if (!Number.isFinite(length) || length !== expectedLength) {
+    return new RequestRetryError('Content-Length mismatch', statusCode, {
+      headers,
+      data: { count: retryCount }
+    })
+  }
+
+  return null
+}
+
 class RetryHandler {
   constructor (opts, handlers) {
     const { retryOptions, ...dispatchOpts } = opts
@@ -20089,6 +20513,7 @@ class RetryHandler {
     this.end = null
     this.etag = null
     this.resume = null
+    this.headersSent = false
 
     // Handle possible onConnect duplication
     this.handler.onConnect(reason => {
@@ -20101,6 +20526,20 @@ class RetryHandler {
     })
   }
 
+  checkpointResponseEnd (headers, resume) {
+    if (this.end == null && this.opts.method !== 'HEAD') {
+      const contentLength = headers['content-length']
+      this.end = contentLength != null ? Number(contentLength) - 1 : null
+
+      assert(
+        this.end == null || Number.isFinite(this.end),
+        'invalid content-length'
+      )
+    }
+
+    this.resume = this.end != null ? resume : null
+  }
+
   onRequestSent () {
     if (this.handler.onRequestSent) {
       this.handler.onRequestSent()
@@ -20189,7 +20628,12 @@ class RetryHandler {
     this.retryCount += 1
 
     if (statusCode >= 300) {
-      if (this.retryOpts.statusCodes.includes(statusCode) === false) {
+      // Only expose a response if no earlier attempt has reached the caller.
+      // Otherwise abort this attempt so the error settles the existing body
+      // instead of replacing it with a new response.
+      if (!this.headersSent && this.retryOpts.statusCodes.includes(statusCode) === false) {
+        this.headersSent = true
+        this.checkpointResponseEnd(headers, resume)
         return this.handler.onHeaders(
           statusCode,
           rawHeaders,
@@ -20250,10 +20694,23 @@ class RetryHandler {
         return false
       }
 
+      const contentLengthError = validatePartialResponseContentLength(headers, contentRange, statusCode, this.retryCount)
+      if (contentLengthError != null) {
+        this.abort(contentLengthError)
+        return false
+      }
+
       const { start, size, end = size - 1 } = contentRange
 
-      assert(this.start === start, 'content-range mismatch')
-      assert(this.end == null || this.end === end, 'content-range mismatch')
+      if (this.start !== start || (this.end != null && this.end !== end)) {
+        this.abort(
+          new RequestRetryError('Content-Range mismatch', statusCode, {
+            headers,
+            data: { count: this.retryCount }
+          })
+        )
+        return false
+      }
 
       this.resume = resume
       return true
@@ -20265,6 +20722,7 @@ class RetryHandler {
         const range = parseRangeHeader(headers['content-range'])
 
         if (range == null) {
+          this.headersSent = true
           return this.handler.onHeaders(
             statusCode,
             rawHeaders,
@@ -20273,6 +20731,12 @@ class RetryHandler {
           )
         }
 
+        const contentLengthError = validatePartialResponseContentLength(headers, range, statusCode, this.retryCount)
+        if (contentLengthError != null) {
+          this.abort(contentLengthError)
+          return false
+        }
+
         const { start, size, end = size - 1 } = range
         assert(
           start != null && Number.isFinite(start),
@@ -20297,6 +20761,7 @@ class RetryHandler {
       )
 
       this.resume = resume
+      this.headersSent = true
       this.etag = headers.etag != null ? headers.etag : null
 
       // Weak etags are not useful for comparison nor cache
@@ -20336,7 +20801,7 @@ class RetryHandler {
   }
 
   onError (err) {
-    if (this.aborted || isDisturbed(this.opts.body)) {
+    if (this.aborted || isDisturbed(this.opts.body) || (this.headersSent && this.resume == null)) {
       return this.handler.onError(err)
     }
 
@@ -24517,7 +24982,7 @@ function validateCookiePath (path) {
 
     if (
       code < 0x20 || // exclude CTLs (0-31)
-      code === 0x7F || // DEL
+      code > 0x7E || // exclude DEL and non-ascii
       code === 0x3B // ;
     ) {
       throw new Error('Invalid cookie path')
@@ -24526,16 +24991,80 @@ function validateCookiePath (path) {
 }
 
 /**
- * I have no idea why these values aren't allowed to be honest,
- * but Deno tests these. - Khafra
+ * <let-dig> ::= <letter> | <digit>
+ *
+ * <letter> ::= any one of the 52 alphabetic characters A through Z in
+ * upper case and a through z in lower case
+ *
+ * <digit> ::= any one of the ten digits 0 through 9r
+ *
+ * @see https://www.rfc-editor.org/rfc/rfc1034#section-3.5
+ * @param {number} code
+ */
+function isLetterOrDigit (code) {
+  return (
+    (code >= 0x30 && code <= 0x39) || // 0-9
+    (code >= 0x41 && code <= 0x5A) || // A-Z
+    (code >= 0x61 && code <= 0x7A) // a-z
+  )
+}
+
+/**
+ * Validates a cookie domain against the "preferred name syntax".
+ *
+ * <domain>      ::= <subdomain> | " "
+ * <subdomain>   ::= <label> | <subdomain> "." <label>
+ * <label>       ::= <let-dig> [ [ <ldh-str> ] <let-dig> ]
+ * <ldh-str>     ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
+ * <let-dig-hyp> ::= <let-dig> | "-"
+ *
+ * @see https://www.rfc-editor.org/rfc/rfc1034#section-3.5
+ * @see https://www.rfc-editor.org/rfc/rfc1123#section-2.1
+ * @see https://www.rfc-editor.org/rfc/rfc1035#section-2.3.4
  * @param {string} domain
  */
 function validateCookieDomain (domain) {
-  if (
-    domain.startsWith('-') ||
-    domain.endsWith('.') ||
-    domain.endsWith('-')
-  ) {
+  // <domain> ::= <subdomain> | " "
+  if (domain === ' ') {
+    return
+  }
+
+  if (domain.length > 255) {
+    throw new Error('Invalid cookie domain')
+  }
+
+  let labelLength = 0
+
+  for (let i = 0; i < domain.length; ++i) {
+    const code = domain.charCodeAt(i)
+
+    if (code === 0x2E) {
+      if (labelLength === 0) {
+        throw new Error('Invalid cookie domain')
+      }
+
+      if (domain.charCodeAt(i - 1) === 0x2D) { // "-"
+        throw new Error('Invalid cookie domain')
+      }
+
+      labelLength = 0
+      continue
+    }
+
+    if (labelLength === 0 && !isLetterOrDigit(code)) {
+      throw new Error('Invalid cookie domain')
+    }
+
+    if (!isLetterOrDigit(code) && code !== 0x2D) { // "-"
+      throw new Error('Invalid cookie domain')
+    }
+
+    if (++labelLength > 63) {
+      throw new Error('Invalid cookie domain')
+    }
+  }
+
+  if (labelLength === 0 || domain.charCodeAt(domain.length - 1) === 0x2D) { // "-"
     throw new Error('Invalid cookie domain')
   }
 }
@@ -24678,7 +25207,13 @@ function stringify (cookie) {
 
     const [key, ...value] = part.split('=')
 
-    out.push(`${key.trim()}=${value.join('=')}`)
+    const trimmedKey = key.trim()
+    const joinedValue = value.join('=')
+
+    validateCookieName(trimmedKey)
+    validateCookieValue(joinedValue)
+
+    out.push(`${trimmedKey}=${joinedValue}`)
   }
 
   return out.join('; ')
@@ -24700,6 +25235,7 @@ module.exports = {
 /***/ ((module, __unused_webpack_exports, __nccwpck_require__) => {
 
 
+const buffer = __nccwpck_require__(4573)
 const { Transform } = __nccwpck_require__(7075)
 const { isASCIINumber, isValidLastEventId } = __nccwpck_require__(4811)
 
@@ -24724,6 +25260,63 @@ const COLON = 0x3A
  */
 const SPACE = 0x20
 
+const defaultMaxEventSize = buffer.kStringMaxLength
+
+const DATA = Buffer.from('data')
+const EVENT = Buffer.from('event')
+const ID = Buffer.from('id')
+const RETRY = Buffer.from('retry')
+
+// Each data field creates a string node, and each unconsumed input chunk keeps
+// a Buffer wrapper. The absolute ceiling protects the large default byte limit.
+const minParserItems = 1024
+const maxParserItems = 131072
+const bytesPerParserItem = 128
+
+function isASCIINumberBytes (buffer, start) {
+  if (start >= buffer.length) {
+    return false
+  }
+
+  for (let i = start; i < buffer.length; i++) {
+    if (buffer[i] < 0x30 || buffer[i] > 0x39) {
+      return false
+    }
+  }
+
+  return true
+}
+
+function isValidLastEventIdBytes (buffer, start) {
+  for (let i = start; i < buffer.length; i++) {
+    if (buffer[i] === 0x00) {
+      return false
+    }
+  }
+
+  return true
+}
+
+function isFieldName (line, length, field) {
+  if (length !== field.length) {
+    return false
+  }
+
+  for (let i = 0; i < length; i++) {
+    if (line[i] !== field[i]) {
+      return false
+    }
+  }
+
+  return true
+}
+
+function createMaxEventSizeExceededError () {
+  const error = new Error('EventSource message size exceeded')
+  error.aborted = false
+  return error
+}
+
 /**
  * @typedef {object} EventSourceStreamEvent
  * @type {object}
@@ -24764,11 +25357,21 @@ class EventSourceStream extends Transform {
   eventEndCheck = false
 
   /**
-   * @type {Buffer}
+   * @type {Buffer[]}
    */
-  buffer = null
+  chunks = []
 
+  chunkIndex = 0
   pos = 0
+  lineChunkIndex = 0
+  linePos = 0
+  lineLength = 0
+  eventSize = 0
+  eventFieldSizes = { data: 0, event: 0, id: 0, retry: 0 }
+  dataLineCount = 0
+  maxEventSize
+  maxDataLines
+  maxBufferedChunks
 
   event = {
     data: undefined,
@@ -24779,6 +25382,7 @@ class EventSourceStream extends Transform {
 
   /**
    * @param {object} options
+   * @param {number} [options.maxEventSize]
    * @param {eventSourceSettings} options.eventSourceSettings
    * @param {Function} [options.push]
    */
@@ -24790,6 +25394,12 @@ class EventSourceStream extends Transform {
     super(options)
 
     this.state = options.eventSourceSettings || {}
+    this.maxEventSize = options.maxEventSize ?? defaultMaxEventSize
+    const parserItemLimit = this.maxEventSize > 0
+      ? Math.min(maxParserItems, Math.max(minParserItems, Math.floor(this.maxEventSize / bytesPerParserItem)))
+      : 0
+    this.maxDataLines = parserItemLimit
+    this.maxBufferedChunks = parserItemLimit
     if (options.push) {
       this.push = options.push
     }
@@ -24807,92 +25417,28 @@ class EventSourceStream extends Transform {
       return
     }
 
-    // Cache the chunk in the buffer, as the data might not be complete while
-    // processing it
-    // TODO: Investigate if there is a more performant way to handle
-    // incoming chunks
-    // see: https://github.com/nodejs/undici/issues/2630
-    if (this.buffer) {
-      this.buffer = Buffer.concat([this.buffer, chunk])
-    } else {
-      this.buffer = chunk
+    // A leading line ending can immediately release the currently buffered
+    // line, even when it uses the final allowed chunk slot.
+    if (this.maxEventSize > 0 &&
+        this.chunks.length >= this.maxBufferedChunks &&
+        chunk[0] !== LF && chunk[0] !== CR) {
+      callback(createMaxEventSizeExceededError())
+      return
     }
+    this.chunks.push(chunk)
 
     // Strip leading byte-order-mark if we opened the stream and started
     // the processing of the incoming data
     if (this.checkBOM) {
-      switch (this.buffer.length) {
-        case 1:
-          // Check if the first byte is the same as the first byte of the BOM
-          if (this.buffer[0] === BOM[0]) {
-            // If it is, we need to wait for more data
-            callback()
-            return
-          }
-          // Set the checkBOM flag to false as we don't need to check for the
-          // BOM anymore
-          this.checkBOM = false
-
-          // The buffer only contains one byte so we need to wait for more data
-          callback()
-          return
-        case 2:
-          // Check if the first two bytes are the same as the first two bytes
-          // of the BOM
-          if (
-            this.buffer[0] === BOM[0] &&
-            this.buffer[1] === BOM[1]
-          ) {
-            // If it is, we need to wait for more data, because the third byte
-            // is needed to determine if it is the BOM or not
-            callback()
-            return
-          }
-
-          // Set the checkBOM flag to false as we don't need to check for the
-          // BOM anymore
-          this.checkBOM = false
-          break
-        case 3:
-          // Check if the first three bytes are the same as the first three
-          // bytes of the BOM
-          if (
-            this.buffer[0] === BOM[0] &&
-            this.buffer[1] === BOM[1] &&
-            this.buffer[2] === BOM[2]
-          ) {
-            // If it is, we can drop the buffered data, as it is only the BOM
-            this.buffer = Buffer.alloc(0)
-            // Set the checkBOM flag to false as we don't need to check for the
-            // BOM anymore
-            this.checkBOM = false
-
-            // Await more data
-            callback()
-            return
-          }
-          // If it is not the BOM, we can start processing the data
-          this.checkBOM = false
-          break
-        default:
-          // The buffer is longer than 3 bytes, so we can drop the BOM if it is
-          // present
-          if (
-            this.buffer[0] === BOM[0] &&
-            this.buffer[1] === BOM[1] &&
-            this.buffer[2] === BOM[2]
-          ) {
-            // Remove the BOM from the buffer
-            this.buffer = this.buffer.subarray(3)
-          }
-
-          // Set the checkBOM flag to false as we don't need to check for the
-          this.checkBOM = false
-          break
+      if (this.handleBOM()) {
+        callback()
+        return
       }
     }
 
-    while (this.pos < this.buffer.length) {
+    while (this.hasCurrentByte()) {
+      const byte = this.currentByte()
+
       // If the previous line ended with an end-of-line, we need to check
       // if the next character is also an end-of-line.
       if (this.eventEndCheck) {
@@ -24905,10 +25451,9 @@ class EventSourceStream extends Transform {
         if (this.crlfCheck) {
           // If the current character is a line feed, we can remove it
           // from the buffer and reset the crlfCheck flag
-          if (this.buffer[this.pos] === LF) {
-            this.buffer = this.buffer.subarray(this.pos + 1)
-            this.pos = 0
+          if (byte === LF) {
             this.crlfCheck = false
+            this.consumeCurrentByte()
 
             // It is possible that the line feed is not the end of the
             // event. We need to check if the next character is an
@@ -24924,19 +25469,17 @@ class EventSourceStream extends Transform {
           this.crlfCheck = false
         }
 
-        if (this.buffer[this.pos] === LF || this.buffer[this.pos] === CR) {
+        if (byte === LF || byte === CR) {
           // If the current character is a carriage return, we need to
           // set the crlfCheck flag to true, as we need to check if the
           // next character is a line feed so we can remove it from the
           // buffer
-          if (this.buffer[this.pos] === CR) {
+          if (byte === CR) {
             this.crlfCheck = true
           }
 
-          this.buffer = this.buffer.subarray(this.pos + 1)
-          this.pos = 0
-          if (
-            this.event.data !== undefined || this.event.event || this.event.id || this.event.retry) {
+          this.consumeCurrentByte()
+          if (this.hasPendingEvent()) {
             this.processEvent(this.event)
           }
           this.clearEvent()
@@ -24950,22 +25493,23 @@ class EventSourceStream extends Transform {
 
       // If the current character is an end-of-line, we can process the
       // line
-      if (this.buffer[this.pos] === LF || this.buffer[this.pos] === CR) {
+      if (byte === LF || byte === CR) {
         // If the current character is a carriage return, we need to
         // set the crlfCheck flag to true, as we need to check if the
         // next character is a line feed
-        if (this.buffer[this.pos] === CR) {
+        if (byte === CR) {
           this.crlfCheck = true
         }
 
         // In any case, we can process the line as we reached an
         // end-of-line character
-        this.parseLine(this.buffer.subarray(0, this.pos), this.event)
-
-        // Remove the processed line from the buffer
-        this.buffer = this.buffer.subarray(this.pos + 1)
-        // Reset the position as we removed the processed line from the buffer
-        this.pos = 0
+        try {
+          this.parseLine(this.readLine(), this.event)
+        } catch (error) {
+          callback(error)
+          return
+        }
+        this.consumeCurrentByte()
         // A line was processed and this could be the end of the event. We need
         // to check if the next line is empty to determine if the event is
         // finished.
@@ -24973,15 +25517,28 @@ class EventSourceStream extends Transform {
         continue
       }
 
-      this.pos++
+      // readLine() is only called after CR or LF. Reject an unfinished line
+      // before it can retain an unbounded number of decoded chunks. The seven
+      // extra bytes allow the longest field prefix ("event: " or "retry: ").
+      if (this.maxEventSize > 0 && ++this.lineLength > this.maxEventSize + 7) {
+        callback(createMaxEventSizeExceededError())
+        return
+      }
+      this.advanceCursor()
     }
 
     callback()
   }
 
+  _destroy (error, callback) {
+    this.chunks.length = 0
+    this.clearEvent()
+    super._destroy(error, callback)
+  }
+
   /**
    * @param {Buffer} line
-   * @param {EventStreamEvent} event
+   * @param {EventSourceStreamEvent} event
    */
   parseLine (line, event) {
     // If the line is empty (a blank line)
@@ -24998,65 +25555,72 @@ class EventSourceStream extends Transform {
       return
     }
 
-    let field = ''
-    let value = ''
+    let fieldLength = line.length
+    let valueStart = line.length
 
     // If the line contains a U+003A COLON character (:)
     if (colonPosition !== -1) {
-      // Collect the characters on the line before the first U+003A COLON
-      // character (:), and let field be that string.
-      // TODO: Investigate if there is a more performant way to extract the
-      // field
-      // see: https://github.com/nodejs/undici/issues/2630
-      field = line.subarray(0, colonPosition).toString('utf8')
+      fieldLength = colonPosition
 
       // Collect the characters on the line after the first U+003A COLON
       // character (:), and let value be that string.
       // If value starts with a U+0020 SPACE character, remove it from value.
-      let valueStart = colonPosition + 1
+      valueStart = colonPosition + 1
       if (line[valueStart] === SPACE) {
         ++valueStart
       }
-      // TODO: Investigate if there is a more performant way to extract the
-      // value
-      // see: https://github.com/nodejs/undici/issues/2630
-      value = line.subarray(valueStart).toString('utf8')
+    }
+
+    if (isFieldName(line, fieldLength, DATA)) {
+      if (this.maxEventSize > 0 && this.dataLineCount >= this.maxDataLines) {
+        throw createMaxEventSizeExceededError()
+      }
+      const valueBytes = line.length - valueStart
+      const dataSize = this.eventFieldSizes.data + (event.data === undefined ? 0 : 1) + valueBytes
+      this.setEventFieldSize('data', dataSize)
 
-      // Otherwise, the string is not empty but does not contain a U+003A COLON
-      // character (:)
-    } else {
-      // Process the field using the steps described below, using the whole
-      // line as the field name, and the empty string as the field value.
-      field = line.toString('utf8')
-      value = ''
-    }
-
-    // Modify the event with the field name and value. The value is also
-    // decoded as UTF-8
-    switch (field) {
-      case 'data':
-        if (event[field] === undefined) {
-          event[field] = value
-        } else {
-          event[field] += `\n${value}`
-        }
-        break
-      case 'retry':
-        if (isASCIINumber(value)) {
-          event[field] = value
-        }
-        break
-      case 'id':
-        if (isValidLastEventId(value)) {
-          event[field] = value
-        }
-        break
-      case 'event':
-        if (value.length > 0) {
-          event[field] = value
-        }
-        break
+      const value = line.toString('utf8', valueStart)
+
+      if (event.data === undefined) {
+        event.data = value
+      } else {
+        event.data += `\n${value}`
+      }
+      this.dataLineCount++
+      return
+    }
+
+    if (isFieldName(line, fieldLength, RETRY)) {
+      if (isASCIINumberBytes(line, valueStart)) {
+        this.setEventFieldSize('retry', line.length - valueStart)
+        event.retry = line.toString('utf8', valueStart)
+      }
+      return
+    }
+
+    if (isFieldName(line, fieldLength, ID)) {
+      if (isValidLastEventIdBytes(line, valueStart)) {
+        this.setEventFieldSize('id', line.length - valueStart)
+        event.id = line.toString('utf8', valueStart)
+      }
+      return
+    }
+
+    if (isFieldName(line, fieldLength, EVENT)) {
+      if (valueStart < line.length) {
+        this.setEventFieldSize('event', line.length - valueStart)
+        event.event = line.toString('utf8', valueStart)
+      }
+    }
+  }
+
+  setEventFieldSize (field, size) {
+    const eventSize = this.eventSize - this.eventFieldSizes[field] + size
+    if (this.maxEventSize > 0 && eventSize > this.maxEventSize) {
+      throw createMaxEventSizeExceededError()
     }
+    this.eventSize = eventSize
+    this.eventFieldSizes[field] = size
   }
 
   /**
@@ -25085,13 +25649,160 @@ class EventSourceStream extends Transform {
   }
 
   clearEvent () {
-    this.event = {
-      data: undefined,
-      event: undefined,
-      id: undefined,
-      retry: undefined
+    this.event.data = undefined
+    this.event.event = undefined
+    this.event.id = undefined
+    this.event.retry = undefined
+    this.eventSize = 0
+    this.dataLineCount = 0
+    this.eventFieldSizes.data = 0
+    this.eventFieldSizes.event = 0
+    this.eventFieldSizes.id = 0
+    this.eventFieldSizes.retry = 0
+  }
+
+  hasPendingEvent () {
+    return this.event.data !== undefined ||
+      this.event.event !== undefined ||
+      this.event.id !== undefined ||
+      this.event.retry !== undefined
+  }
+
+  hasCurrentByte () {
+    return this.chunkIndex < this.chunks.length &&
+      this.pos < this.chunks[this.chunkIndex].length
+  }
+
+  currentByte () {
+    return this.chunks[this.chunkIndex][this.pos]
+  }
+
+  consumeCurrentByte () {
+    this.advanceCursor()
+    this.syncLineStartToCursor()
+  }
+
+  advanceCursor () {
+    this.pos++
+
+    while (this.chunkIndex < this.chunks.length && this.pos >= this.chunks[this.chunkIndex].length) {
+      this.chunkIndex++
+      this.pos = 0
     }
   }
+
+  syncLineStartToCursor () {
+    this.lineChunkIndex = this.chunkIndex
+    this.linePos = this.pos
+    this.lineLength = 0
+    this.dropConsumedChunks()
+  }
+
+  dropConsumedChunks () {
+    if (this.lineChunkIndex > 0) {
+      const consumed = this.lineChunkIndex
+      this.chunks.splice(0, consumed)
+      this.lineChunkIndex = 0
+      this.chunkIndex -= consumed
+    }
+
+    if (this.chunkIndex === this.chunks.length) {
+      this.chunks.length = 0
+      this.chunkIndex = 0
+      this.pos = 0
+      this.lineChunkIndex = 0
+      this.linePos = 0
+    }
+  }
+
+  readLine () {
+    if (this.lineChunkIndex === this.chunkIndex) {
+      return this.chunks[this.chunkIndex].subarray(this.linePos, this.pos)
+    }
+
+    const chunks = []
+    let length = 0
+
+    for (let i = this.lineChunkIndex; i <= this.chunkIndex; i++) {
+      const chunk = this.chunks[i]
+      const start = i === this.lineChunkIndex ? this.linePos : 0
+      const end = i === this.chunkIndex ? this.pos : chunk.length
+      const slice = chunk.subarray(start, end)
+      length += slice.length
+      chunks.push(slice)
+    }
+
+    return Buffer.concat(chunks, length)
+  }
+
+  peekBufferedByte (offset) {
+    let chunkIndex = this.lineChunkIndex
+    let pos = this.linePos
+
+    while (chunkIndex < this.chunks.length) {
+      const chunk = this.chunks[chunkIndex]
+      const remaining = chunk.length - pos
+
+      if (offset < remaining) {
+        return chunk[pos + offset]
+      }
+
+      offset -= remaining
+      chunkIndex++
+      pos = 0
+    }
+  }
+
+  discardLeadingBytes (count) {
+    while (count > 0 && this.lineChunkIndex < this.chunks.length) {
+      const chunk = this.chunks[this.lineChunkIndex]
+      const remaining = chunk.length - this.linePos
+
+      if (count < remaining) {
+        this.linePos += count
+        count = 0
+      } else {
+        count -= remaining
+        this.lineChunkIndex++
+        this.linePos = 0
+      }
+    }
+
+    this.chunkIndex = this.lineChunkIndex
+    this.pos = this.linePos
+    this.dropConsumedChunks()
+  }
+
+  handleBOM () {
+    const first = this.peekBufferedByte(0)
+    const second = this.peekBufferedByte(1)
+    const third = this.peekBufferedByte(2)
+
+    if (second === undefined) {
+      if (first === BOM[0]) {
+        return true
+      }
+
+      this.checkBOM = false
+      return true
+    }
+
+    if (third === undefined) {
+      if (first === BOM[0] && second === BOM[1]) {
+        return true
+      }
+
+      this.checkBOM = false
+      return false
+    }
+
+    if (first === BOM[0] && second === BOM[1] && third === BOM[2]) {
+      this.discardLeadingBytes(3)
+    }
+
+    this.checkBOM = false
+    return !this.hasCurrentByte()
+  }
 }
 
 module.exports = {
@@ -25117,6 +25828,7 @@ const { isNetworkError } = __nccwpck_require__(9051)
 const { delay } = __nccwpck_require__(4811)
 const { kEnumerableProperty } = __nccwpck_require__(3440)
 const { environmentSettingsObject } = __nccwpck_require__(3168)
+const { getGlobalDispatcher } = __nccwpck_require__(2581)
 
 let experimentalWarned = false
 
@@ -25398,6 +26110,7 @@ class EventSource extends EventTarget {
 
       const eventSourceStream = new EventSourceStream({
         eventSourceSettings: this.#state,
+        maxEventSize: this.#dispatcher.eventSourceOptions?.maxEventSize,
         push: (event) => {
           this.dispatchEvent(createFastMessageEvent(
             event.type,
@@ -25576,7 +26289,8 @@ webidl.converters.EventSourceInitDict = webidl.dictionaryConverter([
   },
   {
     key: 'dispatcher', // undici only
-    converter: webidl.converters.any
+    converter: webidl.converters.any,
+    defaultValue: () => getGlobalDispatcher()
   }
 ])
 
@@ -30672,8 +31386,10 @@ async function httpNetworkFetch (
   // 19. Run these steps in parallel:
 
   //    1. Run these steps, but abort when fetchParams is canceled:
-  fetchParams.controller.onAborted = onAborted
-  fetchParams.controller.on('terminated', onAborted)
+  if (!fetchParams.controller.resume) {
+    fetchParams.controller.on('terminated', onAborted)
+  }
+
   fetchParams.controller.resume = async () => {
     // 1. While true
     while (true) {
@@ -30842,8 +31558,6 @@ async function httpNetworkFetch (
           }
           location = headersList.get('location', true)
 
-          this.body = new Readable({ read: resume })
-
           const decoders = []
 
           const willFollow = location && request.redirect === 'follow' &&
@@ -30861,7 +31575,7 @@ async function httpNetworkFetch (
             // CVE fix similar to urllib3 (GHSA-gm62-xv2j-4w53) and curl (CVE-2022-32206).
             const maxContentEncodings = 5
             if (codings.length > maxContentEncodings) {
-              reject(new Error(`too many content-encodings in response: ${codings.length}, maximum allowed is ${maxContentEncodings}`))
+              this.abort(new Error(`too many content-encodings in response: ${codings.length}, maximum allowed is ${maxContentEncodings}`))
               return true
             }
 
@@ -30894,6 +31608,8 @@ async function httpNetworkFetch (
             }
           }
 
+          this.body = new Readable({ read: resume })
+
           const onError = this.onError.bind(this)
 
           resolve({
@@ -30940,10 +31656,6 @@ async function httpNetworkFetch (
             fetchParams.controller.off('terminated', this.abort)
           }
 
-          if (fetchParams.controller.onAborted) {
-            fetchParams.controller.off('terminated', fetchParams.controller.onAborted)
-          }
-
           fetchParams.controller.ended = true
 
           this.body.push(null)
@@ -36359,7 +37071,7 @@ function establishWebSocketConnection (url, protocols, client, ws, onEstablish,
         // is specified, the server needs to include the same field and one of
         // the selected subprotocol values in its response for the connection to
         // be established.
-        if (!requestProtocols.includes(secProtocol)) {
+        if (requestProtocols === null || !requestProtocols.includes(secProtocol)) {
           failWebsocketConnection(ws, 'Protocol was not set in the opening handshake.')
           return
         }
@@ -37120,7 +37832,12 @@ class PerMessageDeflate {
 
         if (this.#maxPayloadSize > 0 && this.#inflate[kLength] > this.#maxPayloadSize) {
           callback(new MessageSizeExceededError())
+          // The inflater may still hold buffered input that can emit a late
+          // zlib error. Remove the data listener, then deterministically stop
+          // the stream so a subsequent 'error' cannot fire without a listener
+          // (which would terminate the process as an unhandled error event).
           this.#inflate.removeAllListeners()
+          this.#inflate.destroy()
           this.#inflate = null
           return
         }
@@ -37413,6 +38130,20 @@ class ByteParser extends Writable {
         if (isControlFrame(this.#info.opcode)) {
           this.#loop = this.parseControlFrame(body)
           this.#state = parserStates.INFO
+
+          // If the automatic PONG/CLOSE reply filled the socket's write buffer,
+          // stop parsing and resume on drain so a PING flood cannot grow the
+          // outbound queue without bound.
+          const socket = this.ws[kResponse].socket
+          if (this.#loop && socket.writableNeedDrain) {
+            this.#loop = false
+            socket.once('drain', () => {
+              if (this.destroyed) return
+              this.#loop = true
+              this.run(callback)
+            })
+            return
+          }
         } else {
           if (!this.#info.compressed) {
             if (!this.writeFragments(body)) {
diff --git a/dist/save/index.js b/dist/save/index.js
index 59f6659..c70736c 100644
--- a/dist/save/index.js
+++ b/dist/save/index.js
@@ -8001,6 +8001,40 @@ var escClose = '\0CLOSE'+Math.random()+'\0';
 var escComma = '\0COMMA'+Math.random()+'\0';
 var escPeriod = '\0PERIOD'+Math.random()+'\0';
 
+var EXPANSION_MAX = 100000
+
+// `EXPANSION_MAX` caps the *number* of expansions, but not their length. An
+// input like `'{a,b}'.repeat(1500)` stays under that count - its output is
+// truncated to 100k results - while making every result ~1500 characters
+// long. The result set, and the intermediate arrays built while combining
+// brace sets, then grow large enough to exhaust memory and crash the process
+// (CVE-2026-14257). `EXPANSION_MAX_LENGTH` bounds the total number of
+// characters the accumulator may hold at any point, so memory stays flat no
+// matter how many brace groups are chained. The limit sits well above any
+// realistic expansion (100k results hitting `EXPANSION_MAX` measure ~1M
+// characters) so legitimate input is unaffected.
+var EXPANSION_MAX_LENGTH = 4000000
+
+// `expand` recurses once per level of brace *nesting* - both when expanding a
+// set's comma members and when re-wrapping a set whose body is a single part.
+// The CVE-2026-14257 fix made the *tail* iterative (recursion on `m.post`, one
+// level per chained group), which left nesting depth unbounded: about 3,100
+// levels of `{{{...a,b...}}}` - only ~6KB of input - exhausted the native stack
+// and crashed the process. `EXPANSION_MAX_DEPTH` bounds how deep the parser
+// will follow nesting. It sits far above any realistic pattern and well below
+// the depth at which the stack runs out.
+var EXPANSION_MAX_DEPTH = 1000
+
+// Bash keeps a quirk where a brace group followed by a comma set still expands
+// (`{a},b}`). The parser implements it by rewriting the string and restarting
+// the scan, absorbing one `}` per pass. `n` trailing braces therefore cost `n`
+// full passes over a string that itself grows by one `escClose` sentinel each
+// time - quadratic in `n`, with a ~26x constant from the sentinel's length.
+// 128KB of `'{a}' + '}'.repeat(n) + ',z}'` blocked the event loop for 27
+// seconds to produce two results. `EXPANSION_MAX_REWRITES` bounds how many
+// times the scan may restart. Real `{a},b}` input needs a handful.
+var EXPANSION_MAX_REWRITES = 1000
+
 function numeric(str) {
   return parseInt(str, 10) == str
     ? parseInt(str, 10)
@@ -8024,40 +8058,66 @@ function unescapeBraces(str) {
 }
 
 
+// Like `target.push(...items)` but doesn't overflow the stack
+function pushAll(target, items) {
+  for (var i = 0; i < items.length; i++) {
+    target.push(items[i]);
+  }
+}
+
 // Basically just str.split(","), but handling cases
 // where we have nested braced sections, which should be
 // treated as individual members, like {a,{b,c},d}
 function parseCommaParts(str) {
-  if (!str)
-    return [''];
-
   var parts = [];
-  var m = balanced('{', '}', str);
 
-  if (!m)
-    return str.split(',');
+  // Walk the brace groups iteratively. Recursing on `post` once per group let a
+  // chain of them exhaust the stack - the parsing-side counterpart to
+  // the `expand` overflow fixed for CVE-2026-14257, and not something `max` or
+  // `maxLength` can bound, since it happens before expansion.
+  //
+  // The part the next chunk continues
+  var carry = '';
 
-  var pre = m.pre;
-  var body = m.body;
-  var post = m.post;
-  var p = pre.split(',');
+  for (;;) {
+    var m = balanced('{', '}', str);
 
-  p[p.length-1] += '{' + body + '}';
-  var postParts = parseCommaParts(post);
-  if (post.length) {
-    p[p.length-1] += postParts.shift();
-    p.push.apply(p, postParts);
-  }
+    if (!m) {
+      var tail = str.split(',');
+      tail[0] = carry + tail[0];
+      pushAll(parts, tail);
+      return parts;
+    }
 
-  parts.push.apply(parts, p);
+    var pre = m.pre;
+    var body = m.body;
+    var post = m.post;
+    var p = pre.split(',');
+
+    p[0] = carry + p[0];
+    p[p.length-1] += '{' + body + '}';
+
+    if (!post.length) {
+      pushAll(parts, p);
+      return parts;
+    }
 
-  return parts;
+    carry = p.pop();
+    pushAll(parts, p);
+    str = post;
+  }
 }
 
-function expandTop(str) {
+function expandTop(str, options) {
   if (!str)
     return [];
 
+  options = options || {};
+  var max = options.max == null ? EXPANSION_MAX : options.max;
+  var maxLength = options.maxLength == null ? EXPANSION_MAX_LENGTH : options.maxLength;
+  var maxDepth = options.maxDepth == null ? EXPANSION_MAX_DEPTH : options.maxDepth;
+  var maxRewrites = options.maxRewrites == null ? EXPANSION_MAX_REWRITES : options.maxRewrites;
+
   // I don't know why Bash 4.3 does this, but it does.
   // Anything starting with {} will have the first two bytes preserved
   // but *only* at the top level, so {},a}b will not expand to anything,
@@ -8068,7 +8128,7 @@ function expandTop(str) {
     str = '\\{\\}' + str.substr(2);
   }
 
-  return expand(escapeBraces(str), true).map(unescapeBraces);
+  return expand(escapeBraces(str), max, maxLength, maxDepth, 0, maxRewrites, true).map(unescapeBraces);
 }
 
 function identity(e) {
@@ -8089,110 +8149,287 @@ function gte(i, y) {
   return i >= y;
 }
 
-function expand(str, isTop) {
-  var expansions = [];
-
-  var m = balanced('{', '}', str);
-  if (!m || /\$$/.test(m.pre)) return [str];
-
-  var isNumericSequence = /^-?\d+\.\.-?\d+(?:\.\.-?\d+)?$/.test(m.body);
-  var isAlphaSequence = /^[a-zA-Z]\.\.[a-zA-Z](?:\.\.-?\d+)?$/.test(m.body);
-  var isSequence = isNumericSequence || isAlphaSequence;
-  var isOptions = m.body.indexOf(',') >= 0;
-  if (!isSequence && !isOptions) {
-    // {a},b}
-    if (m.post.match(/,(?!,).*\}/)) {
-      str = m.pre + '{' + m.body + escClose + m.post;
-      return expand(str);
+// Build `{ acc[a] + pre + values[v] }` for every combination, capping the
+// number of results at `max` and the total number of characters at `maxLength`.
+// This is the one place output grows, so bounding it here keeps the single
+// accumulator - and therefore memory - flat regardless of how many brace groups
+// are combined (CVE-2026-14257).
+//
+// `base[a]` is the length of the part of `acc[a]` that predates the current
+// empty-drop baseline (see `expand`). The matching baselines for the results
+// are appended to `outBase`, which the caller carries forward alongside them.
+function combine(
+  acc,
+  base,
+  pre,
+  values,
+  max,
+  maxLength,
+  dropEmpties,
+  outBase
+) {
+  var out = []
+  var length = 0
+  for (var a = 0; a < acc.length; a++) {
+    for (var v = 0; v < values.length; v++) {
+      if (out.length >= max) return out
+      var expansion = acc[a] + pre + values[v]
+      // Bash drops empty results at the top level. Skip them before they count
+      // against `max`, so `max` bounds the number of *kept* results. "Empty"
+      // means "adds nothing past the baseline", not "empty overall".
+      if (dropEmpties && expansion.length === base[a]) continue
+      if (length + expansion.length > maxLength) return out
+      out.push(expansion)
+      outBase.push(base[a])
+      length += expansion.length
     }
-    return [str];
   }
+  return out
+}
 
-  var n;
-  if (isSequence) {
-    n = m.body.split(/\.\./);
-  } else {
-    n = parseCommaParts(m.body);
-    if (n.length === 1) {
-      // x{{a,b}}y ==> x{a}y x{b}y
-      n = expand(n[0], false).map(embrace);
-      if (n.length === 1) {
-        var post = m.post.length
-          ? expand(m.post, false)
-          : [''];
-        return post.map(function(p) {
-          return m.pre + n[0] + p;
-        });
+// The expansion values of a single numeric (`1..5`) or alphabetic (`a..e..2`)
+// sequence body.
+function expandSequence(
+  body,
+  isAlphaSequence,
+  max,
+  maxLength
+) {
+  var n = body.split(/\.\./)
+  var N = []
+  // A sequence body always splits into two or three parts, but the compiler
+  // can't know that.
+  /* c8 ignore start */
+  if (n[0] === undefined || n[1] === undefined) {
+    return N
+  }
+  /* c8 ignore stop */
+  var x = numeric(n[0])
+  var y = numeric(n[1])
+  var width = Math.max(n[0].length, n[1].length)
+  var incr =
+    n.length === 3 && n[2] !== undefined ?
+      Math.max(Math.abs(numeric(n[2])), 1)
+    : 1
+  var test = lte
+  var reverse = y < x
+  if (reverse) {
+    incr *= -1
+    test = gte
+  }
+  var pad = n.some(isPadded)
+
+  var length = 0
+  for (var i = x; test(i, y) && N.length < max; i += incr) {
+    var c
+    if (isAlphaSequence) {
+      c = String.fromCharCode(i)
+      if (c === '\\') {
+        c = ''
+      }
+    } else {
+      c = String(i)
+      if (pad) {
+        var need = width - c.length
+        if (need > 0) {
+          var z = new Array(need + 1).join('0')
+          if (i < 0) {
+            c = '-' + z + c.slice(1)
+          } else {
+            c = z + c
+          }
+        }
       }
     }
+    if (length + c.length > maxLength) break
+    N.push(c)
+    length += c.length
   }
+  return N
+}
 
-  // at this point, n is the parts, and we know it's not a comma set
-  // with a single entry.
+function expand(
+  str,
+  max,
+  maxLength,
+  maxDepth,
+  depth,
+  maxRewrites,
+  isTop
+) {
+  // Too deeply nested to keep following: treat the rest as literal, the same
+  // way a group that cannot expand is already handled. Truncating rather than
+  // throwing keeps expansion total, matching `max` and `maxLength`.
+  if (depth > maxDepth) {
+    return [str];
+  }
 
-  // no need to expand pre, since it is guaranteed to be free of brace-sets
-  var pre = m.pre;
-  var post = m.post.length
-    ? expand(m.post, false)
-    : [''];
+  // Consume the string's top-level brace groups left to right, threading a
+  // running set of combined prefixes (`acc`). Expanding the tail iteratively -
+  // rather than recursing on `m.post` once per group - keeps the native stack
+  // depth constant, so deeply chained input (`'{a,b}'.repeat(3000)`) can no
+  // longer overflow the stack, and leaves a single accumulator whose size
+  // `maxLength` bounds directly (CVE-2026-14257).
+  var acc = ['']
 
-  var N;
+  // Bash drops empty results, but only when the *first* group of the run is a
+  // comma set - a sequence like `{a..\}` may legitimately yield ''. The drop
+  // is on the final strings, so it is applied to whichever `combine` produces
+  // them (the one with no brace set left in the tail).
+  //
+  // The old implementation recursed on `m.post`, so the drop tested only the
+  // expansion of the current call's substring. The `{a},b}` rewrite below turns
+  // `isTop` back on part-way through a string, starting a fresh such run, so
+  // the drop must ignore whatever `acc` already holds from earlier groups.
+  // `accBase[a]` records how much of `acc[a]` predates the current run;
+  // `combine` treats an expansion as empty when it adds nothing past that.
+  var accBase = [0]
+  // How many times the `{a},b}` rewrite below has restarted the scan. Each pass
+  // re-reads the whole string, so leaving this unbounded is quadratic.
+  var rewrites = 0
+  var dropEmpties = false
+  var firstGroup = true
+  var nextBase
+
+  for (;;) {
+    var m = balanced('{', '}', str);
+
+    // No brace set left: the rest of the string is literal.
+    if (!m) {
+      return combine(acc, accBase, str, [''], max, maxLength, dropEmpties, [])
+    }
+
+    // no need to expand pre, since it is guaranteed to be free of brace-sets
+    var pre = m.pre;
+
+    // For compatibility reasons, `${` is not eligible for brace expansion, and
+    // on the 1.x line it suppresses expansion of the rest of the string too:
+    // the whole remainder is literal. The 2.x and 5.x lines instead keep
+    // expanding the tail, which is what bash does, but changing that here would
+    // be a breaking change for 1.x consumers. Routed through `combine` so the
+    // result is still bounded by `max` and `maxLength`.
+    if (/\$$/.test(pre)) {
+      return combine(acc, accBase, str, [''], max, maxLength, dropEmpties, [])
+    }
+
+    var isNumericSequence = /^-?\d+\.\.-?\d+(?:\.\.-?\d+)?$/.test(m.body);
+    var isAlphaSequence = /^[a-zA-Z]\.\.[a-zA-Z](?:\.\.-?\d+)?$/.test(m.body);
+    var isSequence = isNumericSequence || isAlphaSequence;
+    var isOptions = m.body.indexOf(',') >= 0;
+    if (!isSequence && !isOptions) {
+      // {a},b}
+      if (rewrites < maxRewrites && m.post.match(/,(?!,).*\}/)) {
+        rewrites++;
+        str = m.pre + '{' + m.body + escClose + m.post;
+        // The rewritten string is expanded as if it were a fresh top-level one,
+        // so start a new empty-drop run: anchor the baseline at what `acc`
+        // holds now, and let the next expanding group decide whether to drop.
+        isTop = true
+        firstGroup = true
+        dropEmpties = false
+        accBase = []
+        for (var b = 0; b < acc.length; b++) {
+          accBase.push(acc[b].length)
+        }
+        continue
+      }
+      // Nothing here expands, so the whole remaining string is literal.
+      return combine(
+        acc,
+        accBase,
+        pre + '{' + m.body + '}' + m.post,
+        [''],
+        max,
+        maxLength,
+        dropEmpties,
+        []
+      )
+    }
 
-  if (isSequence) {
-    var x = numeric(n[0]);
-    var y = numeric(n[1]);
-    var width = Math.max(n[0].length, n[1].length)
-    var incr = n.length == 3
-      ? Math.abs(numeric(n[2]))
-      : 1;
-    var test = lte;
-    var reverse = y < x;
-    if (reverse) {
-      incr *= -1;
-      test = gte;
+    if (firstGroup) {
+      dropEmpties = isTop && !isSequence
+      firstGroup = false
     }
-    var pad = n.some(isPadded);
 
-    N = [];
+    var values;
+    if (isSequence) {
+      values = expandSequence(m.body, isAlphaSequence, max, maxLength);
+    } else {
+      var n = parseCommaParts(m.body);
+      if (n.length === 1 && n[0] !== undefined) {
+        // x{{a,b}}y ==> x{a}y x{b}y
+        n = expand(n[0], max, maxLength, maxDepth, depth + 1, maxRewrites, false).map(embrace);
+        //XXX is this necessary? Can't seem to hit it in tests.
+        /* c8 ignore start */
+        if (n.length === 1) {
+          nextBase = []
+          acc = combine(
+            acc,
+            accBase,
+            pre + n[0],
+            [''],
+            max,
+            maxLength,
+            dropEmpties && !m.post.length,
+            nextBase
+          )
+          accBase = nextBase
+          if (!m.post.length) break
+          str = m.post
+          continue
+        }
+        /* c8 ignore stop */
+      }
 
-    for (var i = x; test(i, y); i += incr) {
-      var c;
-      if (isAlphaSequence) {
-        c = String.fromCharCode(i);
-        if (c === '\\')
-          c = '';
-      } else {
-        c = String(i);
-        if (pad) {
-          var need = width - c.length;
-          if (need > 0) {
-            var z = new Array(need + 1).join('0');
-            if (i < 0)
-              c = '-' + z + c.slice(1);
-            else
-              c = z + c;
+      // Values that `combine` is going to drop as empty produce no result, so
+      // they must not count against `max` - otherwise `{a,,b}` with `max: 2`
+      // would stop at `['a', '']` and yield one result instead of two. Skipping
+      // them outright keeps `values` bounded while leaving `max` a bound on
+      // *kept* results. A value is dropped when it adds nothing past the
+      // baseline, which is what `combine` tests.
+      var dropsEmpties = dropEmpties && !m.post.length && !pre
+      for (var d = 0; dropsEmpties && d < acc.length; d++) {
+        if (acc[d].length !== accBase[d]) {
+          dropsEmpties = false
+        }
+      }
+
+      values = []
+      var valuesLength = 0
+      outer: for (var j = 0; j < n.length; j++) {
+        var expanded = expand(n[j], max, maxLength, maxDepth, depth + 1, maxRewrites, false)
+        for (var k = 0; k < expanded.length; k++) {
+          var v = expanded[k]
+          if (dropsEmpties && !v) continue
+          if (values.length >= max || valuesLength + v.length > maxLength) {
+            break outer
           }
+          values.push(v)
+          valuesLength += v.length
         }
       }
-      N.push(c);
     }
-  } else {
-    N = concatMap(n, function(el) { return expand(el, false) });
-  }
 
-  for (var j = 0; j < N.length; j++) {
-    for (var k = 0; k < post.length; k++) {
-      var expansion = pre + N[j] + post[k];
-      if (!isTop || isSequence || expansion)
-        expansions.push(expansion);
-    }
+    nextBase = []
+    acc = combine(
+      acc,
+      accBase,
+      pre,
+      values,
+      max,
+      maxLength,
+      dropEmpties && !m.post.length,
+      nextBase
+    )
+    accBase = nextBase
+    if (!m.post.length) break
+    str = m.post
   }
 
-  return expansions;
+  return acc
 }
 
 
-
 /***/ }),
 
 /***/ 7087:
@@ -14109,11 +14346,77 @@ class Request {
     }
   }
 
-  onUpgrade (statusCode, headers, socket) {
+  /**
+   * @param {number|null} statusCode
+   * @param {Buffer[]|null} headers
+   * @param {import('node:stream').Duplex} socket
+   * @param {string} [statusText]
+   */
+  onUpgrade (statusCode, headers, socket, statusText = '') {
+    this.onFinally()
+
     assert(!this.aborted)
     assert(!this.completed)
 
-    return this[kHandler].onUpgrade(statusCode, headers, socket)
+    if (statusCode !== null) {
+      this.#publishUpgradeHeaders(statusCode, headers, statusText)
+    }
+
+    const result = this[kHandler].onUpgrade(statusCode, headers, socket)
+
+    if (!this.aborted) {
+      this.completed = true
+      if (statusCode !== null) {
+        this.#publishUpgradeTrailers()
+      }
+    }
+
+    return result
+  }
+
+  /**
+   * @param {number} statusCode
+   * @param {import('node:http2').IncomingHttpHeaders} headers
+   * @param {(headers: import('node:http2').IncomingHttpHeaders) => Buffer[]} parseHeaders
+   * @param {string} [statusText]
+   */
+  onUpgradeResponse (statusCode, headers, parseHeaders, statusText = '') {
+    assert(!this.aborted)
+    assert(this.completed)
+
+    if (channels.headers.hasSubscribers) {
+      this.#publishUpgradeHeaders(statusCode, parseHeaders(headers), statusText)
+    }
+    this.#publishUpgradeTrailers()
+  }
+
+  /**
+   * @param {Error} error
+   */
+  onUpgradeError (error) {
+    assert(!this.aborted)
+    assert(this.completed)
+
+    if (channels.error.hasSubscribers) {
+      channels.error.publish({ request: this, error })
+    }
+  }
+
+  /**
+   * @param {number} statusCode
+   * @param {Buffer[]} headers
+   * @param {string} statusText
+   */
+  #publishUpgradeHeaders (statusCode, headers, statusText) {
+    if (channels.headers.hasSubscribers) {
+      channels.headers.publish({ request: this, response: { statusCode, headers, statusText } })
+    }
+  }
+
+  #publishUpgradeTrailers () {
+    if (channels.trailers.hasSubscribers) {
+      channels.trailers.publish({ request: this, trailers: [] })
+    }
   }
 
   onComplete (trailers) {
@@ -14196,7 +14499,13 @@ function processHeader (request, key, val) {
       } else if (typeof val[i] === 'object') {
         throw new InvalidArgumentError(`invalid ${key} header`)
       } else {
-        arr.push(`${val[i]}`)
+        // Coerce primitives (and reject unsafe coercions such as functions
+        // with a crafted toString/Symbol.toPrimitive).
+        const str = `${val[i]}`
+        if (!isValidHeaderValue(str)) {
+          throw new InvalidArgumentError(`invalid ${key} header`)
+        }
+        arr.push(str)
       }
     }
     val = arr
@@ -14207,7 +14516,12 @@ function processHeader (request, key, val) {
   } else if (val === null) {
     val = ''
   } else {
+    // Coerce primitives (and reject unsafe coercions such as functions
+    // with a crafted toString/Symbol.toPrimitive).
     val = `${val}`
+    if (!isValidHeaderValue(val)) {
+      throw new InvalidArgumentError(`invalid ${key} header`)
+    }
   }
 
   if (headerName === 'host') {
@@ -15240,7 +15554,7 @@ function defaultFactory (origin, opts) {
 }
 
 class Agent extends DispatcherBase {
-  constructor ({ factory = defaultFactory, maxRedirections = 0, connect, ...options } = {}) {
+  constructor ({ factory = defaultFactory, maxRedirections = 0, connect, tls, ...options } = {}) {
     if (typeof factory !== 'function') {
       throw new InvalidArgumentError('factory must be a function.')
     }
@@ -15259,11 +15573,15 @@ class Agent extends DispatcherBase {
       connect = { ...connect }
     }
 
+    if (tls && typeof tls !== 'function') {
+      tls = { ...tls }
+    }
+
     this[kInterceptors] = options.interceptors?.Agent && Array.isArray(options.interceptors.Agent)
       ? options.interceptors.Agent
       : [createRedirectInterceptor({ maxRedirections })]
 
-    this[kOptions] = { ...util.deepClone(options), connect }
+    this[kOptions] = { ...util.deepClone(options), connect, tls }
     this[kOptions].interceptors = options.interceptors
       ? { ...options.interceptors }
       : undefined
@@ -15579,6 +15897,7 @@ const {
   RequestContentLengthMismatchError,
   ResponseContentLengthMismatchError,
   RequestAbortedError,
+  InvalidArgumentError,
   HeadersTimeoutError,
   HeadersOverflowError,
   SocketError,
@@ -16000,7 +16319,7 @@ class Parser {
   }
 
   onUpgrade (head) {
-    const { upgrade, client, socket, headers, statusCode } = this
+    const { upgrade, client, socket, headers, statusCode, statusText } = this
 
     assert(upgrade)
     assert(client[kSocket] === socket)
@@ -16035,9 +16354,10 @@ class Parser {
     client.emit('disconnect', client[kUrl], [client], new InformationalError('upgrade'))
 
     try {
-      request.onUpgrade(statusCode, headers, socket)
-    } catch (err) {
-      util.destroy(socket, err)
+      request.onUpgrade(statusCode, headers, socket, statusText)
+    } catch (error) {
+      util.errorRequest(client, request, error)
+      util.destroy(socket, error)
     }
 
     client[kResume]()
@@ -16294,8 +16614,6 @@ async function connectH1 (client, socket) {
   socket[kParser] = new Parser(client, socket, llhttpInstance)
 
   addListener(socket, 'error', function (err) {
-    assert(err.code !== 'ERR_TLS_CERT_ALTNAME_INVALID')
-
     const parser = this[kParser]
 
     // On Mac OS, we get an ECONNRESET even if there is a full body to be forwarded
@@ -16444,7 +16762,7 @@ async function connectH1 (client, socket) {
 
 function clearIdleSocketValidation (socket) {
   if (socket[kIdleSocketValidationTimeout]) {
-    clearTimeout(socket[kIdleSocketValidationTimeout])
+    clearImmediate(socket[kIdleSocketValidationTimeout])
     socket[kIdleSocketValidationTimeout] = null
   }
 
@@ -16453,15 +16771,23 @@ function clearIdleSocketValidation (socket) {
 
 function scheduleIdleSocketValidation (client, socket) {
   socket[kIdleSocketValidation] = 1
-  socket[kIdleSocketValidationTimeout] = setTimeout(() => {
+  // Yield to the check phase (after poll) so unsolicited bytes / FIN / RST
+  // already pending on this idle keep-alive socket are processed before the
+  // next request is written (GHSA-35p6-xmwp-9g52).
+  //
+  // setTimeout(0) pays Node's ~1ms timer floor on every sequential reuse
+  // (#5493). setImmediate avoids that, but an *unref'd* Immediate lets poll
+  // block for ~500ms when the event loop is otherwise idle (#5600 / #5606).
+  // A ref'd Immediate both keeps the pending request alive and makes poll
+  // return immediately — the hybrid those issues asked for.
+  socket[kIdleSocketValidationTimeout] = setImmediate(() => {
     socket[kIdleSocketValidationTimeout] = null
     socket[kIdleSocketValidation] = 2
 
     if (client[kSocket] === socket && !socket.destroyed) {
       client[kResume]()
     }
-  }, 0)
-  socket[kIdleSocketValidationTimeout].unref?.()
+  })
 }
 
 /**
@@ -16562,8 +16888,16 @@ function writeH1 (client, request) {
     }
     body = bodyStream.stream
     contentLength = bodyStream.length
-  } else if (util.isBlobLike(body) && request.contentType == null && body.type) {
-    headers.push('content-type', body.type)
+  } else if (util.isBlobLike(body) && request.contentType == null) {
+    const contentType = body.type
+    if (contentType) {
+      const contentTypeValue = `${contentType}`
+      if (!util.isValidHeaderValue(contentTypeValue)) {
+        util.errorRequest(client, request, new InvalidArgumentError('invalid content-type header'))
+        return false
+      }
+      headers.push('content-type', contentTypeValue)
+    }
   }
 
   if (body && typeof body.read === 'function') {
@@ -16602,12 +16936,22 @@ function writeH1 (client, request) {
   const socket = client[kSocket]
   clearIdleSocketValidation(socket)
 
-  const abort = (err) => {
-    if (request.aborted || request.completed) {
+  /**
+   * @param {Error} [error]
+   */
+  const abort = (error) => {
+    if (request.aborted) {
+      return
+    }
+
+    if (request.completed) {
+      if (request.upgrade || request.method === 'CONNECT') {
+        util.destroy(socket, new InformationalError('aborted'))
+      }
       return
     }
 
-    util.errorRequest(client, request, err || new RequestAbortedError())
+    util.errorRequest(client, request, error || new RequestAbortedError())
 
     util.destroy(body)
     util.destroy(socket, new InformationalError('aborted'))
@@ -17064,6 +17408,7 @@ module.exports = connectH1
 
 
 const assert = __nccwpck_require__(4589)
+const { errorMonitor } = __nccwpck_require__(8474)
 const { pipeline } = __nccwpck_require__(7075)
 const util = __nccwpck_require__(3440)
 const {
@@ -17140,6 +17485,15 @@ function parseH2Headers (headers) {
   return result
 }
 
+/**
+ * @param {import('node:http2').IncomingHttpHeaders} headers
+ * @returns {Buffer[]}
+ */
+function parseH2ResponseHeaders (headers) {
+  const { [HTTP2_HEADER_STATUS]: _statusCode, ...realHeaders } = headers
+  return parseH2Headers(realHeaders)
+}
+
 async function connectH2 (client, socket) {
   client[kSocket] = socket
 
@@ -17189,8 +17543,6 @@ async function connectH2 (client, socket) {
   socket[kHTTP2Session] = session
 
   util.addListener(socket, 'error', function (err) {
-    assert(err.code !== 'ERR_TLS_CERT_ALTNAME_INVALID')
-
     this[kError] = err
 
     this[kClient][kOnError](err)
@@ -17264,8 +17616,6 @@ function resumeH2 (client) {
 }
 
 function onHttp2SessionError (err) {
-  assert(err.code !== 'ERR_TLS_CERT_ALTNAME_INVALID')
-
   this[kSocket][kError] = err
   this[kClient][kOnError](err)
 }
@@ -17360,22 +17710,32 @@ function writeH2 (client, request) {
   headers[HTTP2_HEADER_AUTHORITY] = host || `${hostname}${port ? `:${port}` : ''}`
   headers[HTTP2_HEADER_METHOD] = method
 
-  const abort = (err) => {
-    if (request.aborted || request.completed) {
+  /**
+   * @param {Error} [error]
+   */
+  const abort = (error) => {
+    if (request.aborted) {
+      return
+    }
+
+    if (request.completed) {
+      if (method === 'CONNECT' && stream != null) {
+        util.destroy(stream, error || new RequestAbortedError())
+      }
       return
     }
 
-    err = err || new RequestAbortedError()
+    error = error || new RequestAbortedError()
 
-    util.errorRequest(client, request, err)
+    util.errorRequest(client, request, error)
 
     if (stream != null) {
-      util.destroy(stream, err)
+      util.destroy(stream, error)
     }
 
     // We do not destroy the socket as we can continue using the session
     // the stream get's destroyed and the session remains to create new streams
-    util.destroy(body, err)
+    util.destroy(body, error)
     client[kQueue][client[kRunningIdx]++] = null
     client[kResume]()
   }
@@ -17394,25 +17754,57 @@ function writeH2 (client, request) {
 
   if (method === 'CONNECT') {
     session.ref()
-    // We are already connected, streams are pending, first request
-    // will create a new stream. We trigger a request to create the stream and wait until
-    // `ready` event is triggered
     // We disabled endStream to allow the user to write to the stream
     stream = session.request(headers, { endStream: false, signal })
+    let upgradeResponseFinished = false
 
-    if (stream.id && !stream.pending) {
-      request.onUpgrade(null, null, stream)
-      ++session[kOpenStreams]
-      client[kQueue][client[kRunningIdx]++] = null
-    } else {
-      stream.once('ready', () => {
+    /**
+     * @param {import('node:http2').IncomingHttpHeaders} headers
+     */
+    const onResponse = (headers) => {
+      upgradeResponseFinished = true
+      stream.off(errorMonitor, onUpgradeError)
+      request.onUpgradeResponse(Number(headers[HTTP2_HEADER_STATUS]), headers, parseH2ResponseHeaders)
+    }
+
+    /**
+     * @param {Error} error
+     */
+    const onUpgradeError = (error) => {
+      upgradeResponseFinished = true
+      stream.off('response', onResponse)
+      request.onUpgradeError(error)
+    }
+
+    const onReady = () => {
+      try {
         request.onUpgrade(null, null, stream)
-        ++session[kOpenStreams]
-        client[kQueue][client[kRunningIdx]++] = null
-      })
+      } catch (error) {
+        stream.off('response', onResponse)
+        abort(error)
+        return
+      }
+
+      if (request.aborted) {
+        return
+      }
+
+      stream.off('error', abort)
+      stream.once(errorMonitor, onUpgradeError)
+      client[kQueue][client[kRunningIdx]++] = null
     }
 
+    stream.once('response', onResponse)
+    stream.once('error', abort)
+    ++session[kOpenStreams]
+    onReady()
+
     stream.once('close', () => {
+      if (!upgradeResponseFinished && request.completed) {
+        stream.off('response', onResponse)
+        stream.off(errorMonitor, onUpgradeError)
+        request.onUpgradeError(new InformationalError(`HTTP/2: "stream error" received - code ${stream.rstCode}`))
+      }
       session[kOpenStreams] -= 1
       if (session[kOpenStreams] === 0) session.unref()
     })
@@ -17921,9 +18313,10 @@ class Client extends DispatcherBase {
     // h2
     maxConcurrentStreams,
     allowH2,
-    webSocket
+    webSocket,
+    eventSource
   } = {}) {
-    super({ webSocket })
+    super({ webSocket, eventSource })
 
     if (keepAlive !== undefined) {
       throw new InvalidArgumentError('unsupported keepAlive, use pipelining=0 instead')
@@ -18444,6 +18837,7 @@ module.exports = Client
 
 
 
+const buffer = __nccwpck_require__(4573)
 const Dispatcher = __nccwpck_require__(883)
 const {
   ClientDestroyedError,
@@ -18456,6 +18850,7 @@ const kOnDestroyed = Symbol('onDestroyed')
 const kOnClosed = Symbol('onClosed')
 const kInterceptedDispatch = Symbol('Intercepted Dispatch')
 const kWebSocketOptions = Symbol('webSocketOptions')
+const kEventSourceOptions = Symbol('eventSourceOptions')
 
 class DispatcherBase extends Dispatcher {
   constructor (opts) {
@@ -18466,6 +18861,7 @@ class DispatcherBase extends Dispatcher {
     this[kClosed] = false
     this[kOnClosed] = []
     this[kWebSocketOptions] = opts?.webSocket ?? {}
+    this[kEventSourceOptions] = opts?.eventSource ?? {}
   }
 
   get webSocketOptions () {
@@ -18475,6 +18871,12 @@ class DispatcherBase extends Dispatcher {
     }
   }
 
+  get eventSourceOptions () {
+    return {
+      maxEventSize: this[kEventSourceOptions].maxEventSize ?? buffer.kStringMaxLength
+    }
+  }
+
   get destroyed () {
     return this[kDestroyed]
   }
@@ -20036,6 +20438,28 @@ function calculateRetryAfterHeader (retryAfter) {
   return new Date(retryAfter).getTime() - current
 }
 
+function validatePartialResponseContentLength (headers, range, statusCode, retryCount) {
+  const contentLength = headers['content-length']
+  if (contentLength == null) {
+    return null
+  }
+
+  if (!Number.isFinite(range.start) || !Number.isFinite(range.end)) {
+    return null
+  }
+
+  const length = Number(contentLength)
+  const expectedLength = range.end - range.start + 1
+  if (!Number.isFinite(length) || length !== expectedLength) {
+    return new RequestRetryError('Content-Length mismatch', statusCode, {
+      headers,
+      data: { count: retryCount }
+    })
+  }
+
+  return null
+}
+
 class RetryHandler {
   constructor (opts, handlers) {
     const { retryOptions, ...dispatchOpts } = opts
@@ -20089,6 +20513,7 @@ class RetryHandler {
     this.end = null
     this.etag = null
     this.resume = null
+    this.headersSent = false
 
     // Handle possible onConnect duplication
     this.handler.onConnect(reason => {
@@ -20101,6 +20526,20 @@ class RetryHandler {
     })
   }
 
+  checkpointResponseEnd (headers, resume) {
+    if (this.end == null && this.opts.method !== 'HEAD') {
+      const contentLength = headers['content-length']
+      this.end = contentLength != null ? Number(contentLength) - 1 : null
+
+      assert(
+        this.end == null || Number.isFinite(this.end),
+        'invalid content-length'
+      )
+    }
+
+    this.resume = this.end != null ? resume : null
+  }
+
   onRequestSent () {
     if (this.handler.onRequestSent) {
       this.handler.onRequestSent()
@@ -20189,7 +20628,12 @@ class RetryHandler {
     this.retryCount += 1
 
     if (statusCode >= 300) {
-      if (this.retryOpts.statusCodes.includes(statusCode) === false) {
+      // Only expose a response if no earlier attempt has reached the caller.
+      // Otherwise abort this attempt so the error settles the existing body
+      // instead of replacing it with a new response.
+      if (!this.headersSent && this.retryOpts.statusCodes.includes(statusCode) === false) {
+        this.headersSent = true
+        this.checkpointResponseEnd(headers, resume)
         return this.handler.onHeaders(
           statusCode,
           rawHeaders,
@@ -20250,10 +20694,23 @@ class RetryHandler {
         return false
       }
 
+      const contentLengthError = validatePartialResponseContentLength(headers, contentRange, statusCode, this.retryCount)
+      if (contentLengthError != null) {
+        this.abort(contentLengthError)
+        return false
+      }
+
       const { start, size, end = size - 1 } = contentRange
 
-      assert(this.start === start, 'content-range mismatch')
-      assert(this.end == null || this.end === end, 'content-range mismatch')
+      if (this.start !== start || (this.end != null && this.end !== end)) {
+        this.abort(
+          new RequestRetryError('Content-Range mismatch', statusCode, {
+            headers,
+            data: { count: this.retryCount }
+          })
+        )
+        return false
+      }
 
       this.resume = resume
       return true
@@ -20265,6 +20722,7 @@ class RetryHandler {
         const range = parseRangeHeader(headers['content-range'])
 
         if (range == null) {
+          this.headersSent = true
           return this.handler.onHeaders(
             statusCode,
             rawHeaders,
@@ -20273,6 +20731,12 @@ class RetryHandler {
           )
         }
 
+        const contentLengthError = validatePartialResponseContentLength(headers, range, statusCode, this.retryCount)
+        if (contentLengthError != null) {
+          this.abort(contentLengthError)
+          return false
+        }
+
         const { start, size, end = size - 1 } = range
         assert(
           start != null && Number.isFinite(start),
@@ -20297,6 +20761,7 @@ class RetryHandler {
       )
 
       this.resume = resume
+      this.headersSent = true
       this.etag = headers.etag != null ? headers.etag : null
 
       // Weak etags are not useful for comparison nor cache
@@ -20336,7 +20801,7 @@ class RetryHandler {
   }
 
   onError (err) {
-    if (this.aborted || isDisturbed(this.opts.body)) {
+    if (this.aborted || isDisturbed(this.opts.body) || (this.headersSent && this.resume == null)) {
       return this.handler.onError(err)
     }
 
@@ -24517,7 +24982,7 @@ function validateCookiePath (path) {
 
     if (
       code < 0x20 || // exclude CTLs (0-31)
-      code === 0x7F || // DEL
+      code > 0x7E || // exclude DEL and non-ascii
       code === 0x3B // ;
     ) {
       throw new Error('Invalid cookie path')
@@ -24526,16 +24991,80 @@ function validateCookiePath (path) {
 }
 
 /**
- * I have no idea why these values aren't allowed to be honest,
- * but Deno tests these. - Khafra
+ * <let-dig> ::= <letter> | <digit>
+ *
+ * <letter> ::= any one of the 52 alphabetic characters A through Z in
+ * upper case and a through z in lower case
+ *
+ * <digit> ::= any one of the ten digits 0 through 9r
+ *
+ * @see https://www.rfc-editor.org/rfc/rfc1034#section-3.5
+ * @param {number} code
+ */
+function isLetterOrDigit (code) {
+  return (
+    (code >= 0x30 && code <= 0x39) || // 0-9
+    (code >= 0x41 && code <= 0x5A) || // A-Z
+    (code >= 0x61 && code <= 0x7A) // a-z
+  )
+}
+
+/**
+ * Validates a cookie domain against the "preferred name syntax".
+ *
+ * <domain>      ::= <subdomain> | " "
+ * <subdomain>   ::= <label> | <subdomain> "." <label>
+ * <label>       ::= <let-dig> [ [ <ldh-str> ] <let-dig> ]
+ * <ldh-str>     ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
+ * <let-dig-hyp> ::= <let-dig> | "-"
+ *
+ * @see https://www.rfc-editor.org/rfc/rfc1034#section-3.5
+ * @see https://www.rfc-editor.org/rfc/rfc1123#section-2.1
+ * @see https://www.rfc-editor.org/rfc/rfc1035#section-2.3.4
  * @param {string} domain
  */
 function validateCookieDomain (domain) {
-  if (
-    domain.startsWith('-') ||
-    domain.endsWith('.') ||
-    domain.endsWith('-')
-  ) {
+  // <domain> ::= <subdomain> | " "
+  if (domain === ' ') {
+    return
+  }
+
+  if (domain.length > 255) {
+    throw new Error('Invalid cookie domain')
+  }
+
+  let labelLength = 0
+
+  for (let i = 0; i < domain.length; ++i) {
+    const code = domain.charCodeAt(i)
+
+    if (code === 0x2E) {
+      if (labelLength === 0) {
+        throw new Error('Invalid cookie domain')
+      }
+
+      if (domain.charCodeAt(i - 1) === 0x2D) { // "-"
+        throw new Error('Invalid cookie domain')
+      }
+
+      labelLength = 0
+      continue
+    }
+
+    if (labelLength === 0 && !isLetterOrDigit(code)) {
+      throw new Error('Invalid cookie domain')
+    }
+
+    if (!isLetterOrDigit(code) && code !== 0x2D) { // "-"
+      throw new Error('Invalid cookie domain')
+    }
+
+    if (++labelLength > 63) {
+      throw new Error('Invalid cookie domain')
+    }
+  }
+
+  if (labelLength === 0 || domain.charCodeAt(domain.length - 1) === 0x2D) { // "-"
     throw new Error('Invalid cookie domain')
   }
 }
@@ -24678,7 +25207,13 @@ function stringify (cookie) {
 
     const [key, ...value] = part.split('=')
 
-    out.push(`${key.trim()}=${value.join('=')}`)
+    const trimmedKey = key.trim()
+    const joinedValue = value.join('=')
+
+    validateCookieName(trimmedKey)
+    validateCookieValue(joinedValue)
+
+    out.push(`${trimmedKey}=${joinedValue}`)
   }
 
   return out.join('; ')
@@ -24700,6 +25235,7 @@ module.exports = {
 /***/ ((module, __unused_webpack_exports, __nccwpck_require__) => {
 
 
+const buffer = __nccwpck_require__(4573)
 const { Transform } = __nccwpck_require__(7075)
 const { isASCIINumber, isValidLastEventId } = __nccwpck_require__(4811)
 
@@ -24724,6 +25260,63 @@ const COLON = 0x3A
  */
 const SPACE = 0x20
 
+const defaultMaxEventSize = buffer.kStringMaxLength
+
+const DATA = Buffer.from('data')
+const EVENT = Buffer.from('event')
+const ID = Buffer.from('id')
+const RETRY = Buffer.from('retry')
+
+// Each data field creates a string node, and each unconsumed input chunk keeps
+// a Buffer wrapper. The absolute ceiling protects the large default byte limit.
+const minParserItems = 1024
+const maxParserItems = 131072
+const bytesPerParserItem = 128
+
+function isASCIINumberBytes (buffer, start) {
+  if (start >= buffer.length) {
+    return false
+  }
+
+  for (let i = start; i < buffer.length; i++) {
+    if (buffer[i] < 0x30 || buffer[i] > 0x39) {
+      return false
+    }
+  }
+
+  return true
+}
+
+function isValidLastEventIdBytes (buffer, start) {
+  for (let i = start; i < buffer.length; i++) {
+    if (buffer[i] === 0x00) {
+      return false
+    }
+  }
+
+  return true
+}
+
+function isFieldName (line, length, field) {
+  if (length !== field.length) {
+    return false
+  }
+
+  for (let i = 0; i < length; i++) {
+    if (line[i] !== field[i]) {
+      return false
+    }
+  }
+
+  return true
+}
+
+function createMaxEventSizeExceededError () {
+  const error = new Error('EventSource message size exceeded')
+  error.aborted = false
+  return error
+}
+
 /**
  * @typedef {object} EventSourceStreamEvent
  * @type {object}
@@ -24764,11 +25357,21 @@ class EventSourceStream extends Transform {
   eventEndCheck = false
 
   /**
-   * @type {Buffer}
+   * @type {Buffer[]}
    */
-  buffer = null
+  chunks = []
 
+  chunkIndex = 0
   pos = 0
+  lineChunkIndex = 0
+  linePos = 0
+  lineLength = 0
+  eventSize = 0
+  eventFieldSizes = { data: 0, event: 0, id: 0, retry: 0 }
+  dataLineCount = 0
+  maxEventSize
+  maxDataLines
+  maxBufferedChunks
 
   event = {
     data: undefined,
@@ -24779,6 +25382,7 @@ class EventSourceStream extends Transform {
 
   /**
    * @param {object} options
+   * @param {number} [options.maxEventSize]
    * @param {eventSourceSettings} options.eventSourceSettings
    * @param {Function} [options.push]
    */
@@ -24790,6 +25394,12 @@ class EventSourceStream extends Transform {
     super(options)
 
     this.state = options.eventSourceSettings || {}
+    this.maxEventSize = options.maxEventSize ?? defaultMaxEventSize
+    const parserItemLimit = this.maxEventSize > 0
+      ? Math.min(maxParserItems, Math.max(minParserItems, Math.floor(this.maxEventSize / bytesPerParserItem)))
+      : 0
+    this.maxDataLines = parserItemLimit
+    this.maxBufferedChunks = parserItemLimit
     if (options.push) {
       this.push = options.push
     }
@@ -24807,92 +25417,28 @@ class EventSourceStream extends Transform {
       return
     }
 
-    // Cache the chunk in the buffer, as the data might not be complete while
-    // processing it
-    // TODO: Investigate if there is a more performant way to handle
-    // incoming chunks
-    // see: https://github.com/nodejs/undici/issues/2630
-    if (this.buffer) {
-      this.buffer = Buffer.concat([this.buffer, chunk])
-    } else {
-      this.buffer = chunk
+    // A leading line ending can immediately release the currently buffered
+    // line, even when it uses the final allowed chunk slot.
+    if (this.maxEventSize > 0 &&
+        this.chunks.length >= this.maxBufferedChunks &&
+        chunk[0] !== LF && chunk[0] !== CR) {
+      callback(createMaxEventSizeExceededError())
+      return
     }
+    this.chunks.push(chunk)
 
     // Strip leading byte-order-mark if we opened the stream and started
     // the processing of the incoming data
     if (this.checkBOM) {
-      switch (this.buffer.length) {
-        case 1:
-          // Check if the first byte is the same as the first byte of the BOM
-          if (this.buffer[0] === BOM[0]) {
-            // If it is, we need to wait for more data
-            callback()
-            return
-          }
-          // Set the checkBOM flag to false as we don't need to check for the
-          // BOM anymore
-          this.checkBOM = false
-
-          // The buffer only contains one byte so we need to wait for more data
-          callback()
-          return
-        case 2:
-          // Check if the first two bytes are the same as the first two bytes
-          // of the BOM
-          if (
-            this.buffer[0] === BOM[0] &&
-            this.buffer[1] === BOM[1]
-          ) {
-            // If it is, we need to wait for more data, because the third byte
-            // is needed to determine if it is the BOM or not
-            callback()
-            return
-          }
-
-          // Set the checkBOM flag to false as we don't need to check for the
-          // BOM anymore
-          this.checkBOM = false
-          break
-        case 3:
-          // Check if the first three bytes are the same as the first three
-          // bytes of the BOM
-          if (
-            this.buffer[0] === BOM[0] &&
-            this.buffer[1] === BOM[1] &&
-            this.buffer[2] === BOM[2]
-          ) {
-            // If it is, we can drop the buffered data, as it is only the BOM
-            this.buffer = Buffer.alloc(0)
-            // Set the checkBOM flag to false as we don't need to check for the
-            // BOM anymore
-            this.checkBOM = false
-
-            // Await more data
-            callback()
-            return
-          }
-          // If it is not the BOM, we can start processing the data
-          this.checkBOM = false
-          break
-        default:
-          // The buffer is longer than 3 bytes, so we can drop the BOM if it is
-          // present
-          if (
-            this.buffer[0] === BOM[0] &&
-            this.buffer[1] === BOM[1] &&
-            this.buffer[2] === BOM[2]
-          ) {
-            // Remove the BOM from the buffer
-            this.buffer = this.buffer.subarray(3)
-          }
-
-          // Set the checkBOM flag to false as we don't need to check for the
-          this.checkBOM = false
-          break
+      if (this.handleBOM()) {
+        callback()
+        return
       }
     }
 
-    while (this.pos < this.buffer.length) {
+    while (this.hasCurrentByte()) {
+      const byte = this.currentByte()
+
       // If the previous line ended with an end-of-line, we need to check
       // if the next character is also an end-of-line.
       if (this.eventEndCheck) {
@@ -24905,10 +25451,9 @@ class EventSourceStream extends Transform {
         if (this.crlfCheck) {
           // If the current character is a line feed, we can remove it
           // from the buffer and reset the crlfCheck flag
-          if (this.buffer[this.pos] === LF) {
-            this.buffer = this.buffer.subarray(this.pos + 1)
-            this.pos = 0
+          if (byte === LF) {
             this.crlfCheck = false
+            this.consumeCurrentByte()
 
             // It is possible that the line feed is not the end of the
             // event. We need to check if the next character is an
@@ -24924,19 +25469,17 @@ class EventSourceStream extends Transform {
           this.crlfCheck = false
         }
 
-        if (this.buffer[this.pos] === LF || this.buffer[this.pos] === CR) {
+        if (byte === LF || byte === CR) {
           // If the current character is a carriage return, we need to
           // set the crlfCheck flag to true, as we need to check if the
           // next character is a line feed so we can remove it from the
           // buffer
-          if (this.buffer[this.pos] === CR) {
+          if (byte === CR) {
             this.crlfCheck = true
           }
 
-          this.buffer = this.buffer.subarray(this.pos + 1)
-          this.pos = 0
-          if (
-            this.event.data !== undefined || this.event.event || this.event.id || this.event.retry) {
+          this.consumeCurrentByte()
+          if (this.hasPendingEvent()) {
             this.processEvent(this.event)
           }
           this.clearEvent()
@@ -24950,22 +25493,23 @@ class EventSourceStream extends Transform {
 
       // If the current character is an end-of-line, we can process the
       // line
-      if (this.buffer[this.pos] === LF || this.buffer[this.pos] === CR) {
+      if (byte === LF || byte === CR) {
         // If the current character is a carriage return, we need to
         // set the crlfCheck flag to true, as we need to check if the
         // next character is a line feed
-        if (this.buffer[this.pos] === CR) {
+        if (byte === CR) {
           this.crlfCheck = true
         }
 
         // In any case, we can process the line as we reached an
         // end-of-line character
-        this.parseLine(this.buffer.subarray(0, this.pos), this.event)
-
-        // Remove the processed line from the buffer
-        this.buffer = this.buffer.subarray(this.pos + 1)
-        // Reset the position as we removed the processed line from the buffer
-        this.pos = 0
+        try {
+          this.parseLine(this.readLine(), this.event)
+        } catch (error) {
+          callback(error)
+          return
+        }
+        this.consumeCurrentByte()
         // A line was processed and this could be the end of the event. We need
         // to check if the next line is empty to determine if the event is
         // finished.
@@ -24973,15 +25517,28 @@ class EventSourceStream extends Transform {
         continue
       }
 
-      this.pos++
+      // readLine() is only called after CR or LF. Reject an unfinished line
+      // before it can retain an unbounded number of decoded chunks. The seven
+      // extra bytes allow the longest field prefix ("event: " or "retry: ").
+      if (this.maxEventSize > 0 && ++this.lineLength > this.maxEventSize + 7) {
+        callback(createMaxEventSizeExceededError())
+        return
+      }
+      this.advanceCursor()
     }
 
     callback()
   }
 
+  _destroy (error, callback) {
+    this.chunks.length = 0
+    this.clearEvent()
+    super._destroy(error, callback)
+  }
+
   /**
    * @param {Buffer} line
-   * @param {EventStreamEvent} event
+   * @param {EventSourceStreamEvent} event
    */
   parseLine (line, event) {
     // If the line is empty (a blank line)
@@ -24998,65 +25555,72 @@ class EventSourceStream extends Transform {
       return
     }
 
-    let field = ''
-    let value = ''
+    let fieldLength = line.length
+    let valueStart = line.length
 
     // If the line contains a U+003A COLON character (:)
     if (colonPosition !== -1) {
-      // Collect the characters on the line before the first U+003A COLON
-      // character (:), and let field be that string.
-      // TODO: Investigate if there is a more performant way to extract the
-      // field
-      // see: https://github.com/nodejs/undici/issues/2630
-      field = line.subarray(0, colonPosition).toString('utf8')
+      fieldLength = colonPosition
 
       // Collect the characters on the line after the first U+003A COLON
       // character (:), and let value be that string.
       // If value starts with a U+0020 SPACE character, remove it from value.
-      let valueStart = colonPosition + 1
+      valueStart = colonPosition + 1
       if (line[valueStart] === SPACE) {
         ++valueStart
       }
-      // TODO: Investigate if there is a more performant way to extract the
-      // value
-      // see: https://github.com/nodejs/undici/issues/2630
-      value = line.subarray(valueStart).toString('utf8')
+    }
+
+    if (isFieldName(line, fieldLength, DATA)) {
+      if (this.maxEventSize > 0 && this.dataLineCount >= this.maxDataLines) {
+        throw createMaxEventSizeExceededError()
+      }
+      const valueBytes = line.length - valueStart
+      const dataSize = this.eventFieldSizes.data + (event.data === undefined ? 0 : 1) + valueBytes
+      this.setEventFieldSize('data', dataSize)
 
-      // Otherwise, the string is not empty but does not contain a U+003A COLON
-      // character (:)
-    } else {
-      // Process the field using the steps described below, using the whole
-      // line as the field name, and the empty string as the field value.
-      field = line.toString('utf8')
-      value = ''
-    }
-
-    // Modify the event with the field name and value. The value is also
-    // decoded as UTF-8
-    switch (field) {
-      case 'data':
-        if (event[field] === undefined) {
-          event[field] = value
-        } else {
-          event[field] += `\n${value}`
-        }
-        break
-      case 'retry':
-        if (isASCIINumber(value)) {
-          event[field] = value
-        }
-        break
-      case 'id':
-        if (isValidLastEventId(value)) {
-          event[field] = value
-        }
-        break
-      case 'event':
-        if (value.length > 0) {
-          event[field] = value
-        }
-        break
+      const value = line.toString('utf8', valueStart)
+
+      if (event.data === undefined) {
+        event.data = value
+      } else {
+        event.data += `\n${value}`
+      }
+      this.dataLineCount++
+      return
+    }
+
+    if (isFieldName(line, fieldLength, RETRY)) {
+      if (isASCIINumberBytes(line, valueStart)) {
+        this.setEventFieldSize('retry', line.length - valueStart)
+        event.retry = line.toString('utf8', valueStart)
+      }
+      return
+    }
+
+    if (isFieldName(line, fieldLength, ID)) {
+      if (isValidLastEventIdBytes(line, valueStart)) {
+        this.setEventFieldSize('id', line.length - valueStart)
+        event.id = line.toString('utf8', valueStart)
+      }
+      return
+    }
+
+    if (isFieldName(line, fieldLength, EVENT)) {
+      if (valueStart < line.length) {
+        this.setEventFieldSize('event', line.length - valueStart)
+        event.event = line.toString('utf8', valueStart)
+      }
+    }
+  }
+
+  setEventFieldSize (field, size) {
+    const eventSize = this.eventSize - this.eventFieldSizes[field] + size
+    if (this.maxEventSize > 0 && eventSize > this.maxEventSize) {
+      throw createMaxEventSizeExceededError()
     }
+    this.eventSize = eventSize
+    this.eventFieldSizes[field] = size
   }
 
   /**
@@ -25085,13 +25649,160 @@ class EventSourceStream extends Transform {
   }
 
   clearEvent () {
-    this.event = {
-      data: undefined,
-      event: undefined,
-      id: undefined,
-      retry: undefined
+    this.event.data = undefined
+    this.event.event = undefined
+    this.event.id = undefined
+    this.event.retry = undefined
+    this.eventSize = 0
+    this.dataLineCount = 0
+    this.eventFieldSizes.data = 0
+    this.eventFieldSizes.event = 0
+    this.eventFieldSizes.id = 0
+    this.eventFieldSizes.retry = 0
+  }
+
+  hasPendingEvent () {
+    return this.event.data !== undefined ||
+      this.event.event !== undefined ||
+      this.event.id !== undefined ||
+      this.event.retry !== undefined
+  }
+
+  hasCurrentByte () {
+    return this.chunkIndex < this.chunks.length &&
+      this.pos < this.chunks[this.chunkIndex].length
+  }
+
+  currentByte () {
+    return this.chunks[this.chunkIndex][this.pos]
+  }
+
+  consumeCurrentByte () {
+    this.advanceCursor()
+    this.syncLineStartToCursor()
+  }
+
+  advanceCursor () {
+    this.pos++
+
+    while (this.chunkIndex < this.chunks.length && this.pos >= this.chunks[this.chunkIndex].length) {
+      this.chunkIndex++
+      this.pos = 0
     }
   }
+
+  syncLineStartToCursor () {
+    this.lineChunkIndex = this.chunkIndex
+    this.linePos = this.pos
+    this.lineLength = 0
+    this.dropConsumedChunks()
+  }
+
+  dropConsumedChunks () {
+    if (this.lineChunkIndex > 0) {
+      const consumed = this.lineChunkIndex
+      this.chunks.splice(0, consumed)
+      this.lineChunkIndex = 0
+      this.chunkIndex -= consumed
+    }
+
+    if (this.chunkIndex === this.chunks.length) {
+      this.chunks.length = 0
+      this.chunkIndex = 0
+      this.pos = 0
+      this.lineChunkIndex = 0
+      this.linePos = 0
+    }
+  }
+
+  readLine () {
+    if (this.lineChunkIndex === this.chunkIndex) {
+      return this.chunks[this.chunkIndex].subarray(this.linePos, this.pos)
+    }
+
+    const chunks = []
+    let length = 0
+
+    for (let i = this.lineChunkIndex; i <= this.chunkIndex; i++) {
+      const chunk = this.chunks[i]
+      const start = i === this.lineChunkIndex ? this.linePos : 0
+      const end = i === this.chunkIndex ? this.pos : chunk.length
+      const slice = chunk.subarray(start, end)
+      length += slice.length
+      chunks.push(slice)
+    }
+
+    return Buffer.concat(chunks, length)
+  }
+
+  peekBufferedByte (offset) {
+    let chunkIndex = this.lineChunkIndex
+    let pos = this.linePos
+
+    while (chunkIndex < this.chunks.length) {
+      const chunk = this.chunks[chunkIndex]
+      const remaining = chunk.length - pos
+
+      if (offset < remaining) {
+        return chunk[pos + offset]
+      }
+
+      offset -= remaining
+      chunkIndex++
+      pos = 0
+    }
+  }
+
+  discardLeadingBytes (count) {
+    while (count > 0 && this.lineChunkIndex < this.chunks.length) {
+      const chunk = this.chunks[this.lineChunkIndex]
+      const remaining = chunk.length - this.linePos
+
+      if (count < remaining) {
+        this.linePos += count
+        count = 0
+      } else {
+        count -= remaining
+        this.lineChunkIndex++
+        this.linePos = 0
+      }
+    }
+
+    this.chunkIndex = this.lineChunkIndex
+    this.pos = this.linePos
+    this.dropConsumedChunks()
+  }
+
+  handleBOM () {
+    const first = this.peekBufferedByte(0)
+    const second = this.peekBufferedByte(1)
+    const third = this.peekBufferedByte(2)
+
+    if (second === undefined) {
+      if (first === BOM[0]) {
+        return true
+      }
+
+      this.checkBOM = false
+      return true
+    }
+
+    if (third === undefined) {
+      if (first === BOM[0] && second === BOM[1]) {
+        return true
+      }
+
+      this.checkBOM = false
+      return false
+    }
+
+    if (first === BOM[0] && second === BOM[1] && third === BOM[2]) {
+      this.discardLeadingBytes(3)
+    }
+
+    this.checkBOM = false
+    return !this.hasCurrentByte()
+  }
 }
 
 module.exports = {
@@ -25117,6 +25828,7 @@ const { isNetworkError } = __nccwpck_require__(9051)
 const { delay } = __nccwpck_require__(4811)
 const { kEnumerableProperty } = __nccwpck_require__(3440)
 const { environmentSettingsObject } = __nccwpck_require__(3168)
+const { getGlobalDispatcher } = __nccwpck_require__(2581)
 
 let experimentalWarned = false
 
@@ -25398,6 +26110,7 @@ class EventSource extends EventTarget {
 
       const eventSourceStream = new EventSourceStream({
         eventSourceSettings: this.#state,
+        maxEventSize: this.#dispatcher.eventSourceOptions?.maxEventSize,
         push: (event) => {
           this.dispatchEvent(createFastMessageEvent(
             event.type,
@@ -25576,7 +26289,8 @@ webidl.converters.EventSourceInitDict = webidl.dictionaryConverter([
   },
   {
     key: 'dispatcher', // undici only
-    converter: webidl.converters.any
+    converter: webidl.converters.any,
+    defaultValue: () => getGlobalDispatcher()
   }
 ])
 
@@ -30672,8 +31386,10 @@ async function httpNetworkFetch (
   // 19. Run these steps in parallel:
 
   //    1. Run these steps, but abort when fetchParams is canceled:
-  fetchParams.controller.onAborted = onAborted
-  fetchParams.controller.on('terminated', onAborted)
+  if (!fetchParams.controller.resume) {
+    fetchParams.controller.on('terminated', onAborted)
+  }
+
   fetchParams.controller.resume = async () => {
     // 1. While true
     while (true) {
@@ -30842,8 +31558,6 @@ async function httpNetworkFetch (
           }
           location = headersList.get('location', true)
 
-          this.body = new Readable({ read: resume })
-
           const decoders = []
 
           const willFollow = location && request.redirect === 'follow' &&
@@ -30861,7 +31575,7 @@ async function httpNetworkFetch (
             // CVE fix similar to urllib3 (GHSA-gm62-xv2j-4w53) and curl (CVE-2022-32206).
             const maxContentEncodings = 5
             if (codings.length > maxContentEncodings) {
-              reject(new Error(`too many content-encodings in response: ${codings.length}, maximum allowed is ${maxContentEncodings}`))
+              this.abort(new Error(`too many content-encodings in response: ${codings.length}, maximum allowed is ${maxContentEncodings}`))
               return true
             }
 
@@ -30894,6 +31608,8 @@ async function httpNetworkFetch (
             }
           }
 
+          this.body = new Readable({ read: resume })
+
           const onError = this.onError.bind(this)
 
           resolve({
@@ -30940,10 +31656,6 @@ async function httpNetworkFetch (
             fetchParams.controller.off('terminated', this.abort)
           }
 
-          if (fetchParams.controller.onAborted) {
-            fetchParams.controller.off('terminated', fetchParams.controller.onAborted)
-          }
-
           fetchParams.controller.ended = true
 
           this.body.push(null)
@@ -36359,7 +37071,7 @@ function establishWebSocketConnection (url, protocols, client, ws, onEstablish,
         // is specified, the server needs to include the same field and one of
         // the selected subprotocol values in its response for the connection to
         // be established.
-        if (!requestProtocols.includes(secProtocol)) {
+        if (requestProtocols === null || !requestProtocols.includes(secProtocol)) {
           failWebsocketConnection(ws, 'Protocol was not set in the opening handshake.')
           return
         }
@@ -37120,7 +37832,12 @@ class PerMessageDeflate {
 
         if (this.#maxPayloadSize > 0 && this.#inflate[kLength] > this.#maxPayloadSize) {
           callback(new MessageSizeExceededError())
+          // The inflater may still hold buffered input that can emit a late
+          // zlib error. Remove the data listener, then deterministically stop
+          // the stream so a subsequent 'error' cannot fire without a listener
+          // (which would terminate the process as an unhandled error event).
           this.#inflate.removeAllListeners()
+          this.#inflate.destroy()
           this.#inflate = null
           return
         }
@@ -37413,6 +38130,20 @@ class ByteParser extends Writable {
         if (isControlFrame(this.#info.opcode)) {
           this.#loop = this.parseControlFrame(body)
           this.#state = parserStates.INFO
+
+          // If the automatic PONG/CLOSE reply filled the socket's write buffer,
+          // stop parsing and resume on drain so a PING flood cannot grow the
+          // outbound queue without bound.
+          const socket = this.ws[kResponse].socket
+          if (this.#loop && socket.writableNeedDrain) {
+            this.#loop = false
+            socket.once('drain', () => {
+              if (this.destroyed) return
+              this.#loop = true
+              this.run(callback)
+            })
+            return
+          }
         } else {
           if (!this.#info.compressed) {
             if (!this.writeFragments(body)) {
diff --git a/package-lock.json b/package-lock.json
index ba6cd9d..2daee15 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -399,13 +399,13 @@
       }
     },
     "node_modules/@babel/code-frame": {
-      "version": "7.28.6",
-      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.28.6.tgz",
-      "integrity": "sha512-JYgintcMjRiCvS8mMECzaEn+m3PfoQiyqukOMCCVQtoJGYJw8j/8LBJEiqkHLkfwCcs74E3pbAUFNg7d9VNJ+Q==",
+      "version": "7.29.7",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.29.7.tgz",
+      "integrity": "sha512-Aup7aUOfpbAUg2ROOJN6Iw5f9DMBlzu0mIkm/malLQFN/YQgO48wCj0Kxa3sEHJvPVFg7siR+qRInwXd2qhQKw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@babel/helper-validator-identifier": "^7.28.5",
+        "@babel/helper-validator-identifier": "^7.29.7",
         "js-tokens": "^4.0.0",
         "picocolors": "^1.1.1"
       },
@@ -414,9 +414,9 @@
       }
     },
     "node_modules/@babel/compat-data": {
-      "version": "7.28.6",
-      "resolved": "https://registry.npmjs.org/@babel/compat-data/-/compat-data-7.28.6.tgz",
-      "integrity": "sha512-2lfu57JtzctfIrcGMz992hyLlByuzgIk58+hhGCxjKZ3rWI82NnVLjXcaTqkI2NvlcvOskZaiZ5kjUALo3Lpxg==",
+      "version": "7.29.7",
+      "resolved": "https://registry.npmjs.org/@babel/compat-data/-/compat-data-7.29.7.tgz",
+      "integrity": "sha512-locTkQyKvwIEgBzVrn8693ebc97F2U8ZHjbXwDXJ5Fn2TCpNwTlKcaKLkdHop5c/icOFE7qt7Q9JC5hnKNa6Gg==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -424,21 +424,21 @@
       }
     },
     "node_modules/@babel/core": {
-      "version": "7.28.6",
-      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.28.6.tgz",
-      "integrity": "sha512-H3mcG6ZDLTlYfaSNi0iOKkigqMFvkTKlGUYlD8GW7nNOYRrevuA46iTypPyv+06V3fEmvvazfntkBU34L0azAw==",
+      "version": "7.29.7",
+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.29.7.tgz",
+      "integrity": "sha512-RgHBCvtjbOK2gXSNBNIkNoEc9qoVEtau3hj8gEqKQuL3HZAibKarWFEI3Lfm6EYKkLalOh8eSrj9b+ch9H/VBA==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@babel/code-frame": "^7.28.6",
-        "@babel/generator": "^7.28.6",
-        "@babel/helper-compilation-targets": "^7.28.6",
-        "@babel/helper-module-transforms": "^7.28.6",
-        "@babel/helpers": "^7.28.6",
-        "@babel/parser": "^7.28.6",
-        "@babel/template": "^7.28.6",
-        "@babel/traverse": "^7.28.6",
-        "@babel/types": "^7.28.6",
+        "@babel/code-frame": "^7.29.7",
+        "@babel/generator": "^7.29.7",
+        "@babel/helper-compilation-targets": "^7.29.7",
+        "@babel/helper-module-transforms": "^7.29.7",
+        "@babel/helpers": "^7.29.7",
+        "@babel/parser": "^7.29.7",
+        "@babel/template": "^7.29.7",
+        "@babel/traverse": "^7.29.7",
+        "@babel/types": "^7.29.7",
         "@jridgewell/remapping": "^2.3.5",
         "convert-source-map": "^2.0.0",
         "debug": "^4.1.0",
@@ -455,14 +455,14 @@
       }
     },
     "node_modules/@babel/generator": {
-      "version": "7.28.6",
-      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.28.6.tgz",
-      "integrity": "sha512-lOoVRwADj8hjf7al89tvQ2a1lf53Z+7tiXMgpZJL3maQPDxh0DgLMN62B2MKUOFcoodBHLMbDM6WAbKgNy5Suw==",
+      "version": "7.29.8",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.29.8.tgz",
+      "integrity": "sha512-gZbepsdh3WDtgZKWL+vTPh71LSBrm/Y4/QDZBVCcYfmeTEEuoOYwlSy+G1StfJg+/Zy550u/3TATbm7qDbbMtg==",
       "dev": true,
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+        "minimist": "^1.2.8",
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@@ -5829,9 +5832,9 @@
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+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.1.7.tgz",
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@@ -6190,9 +6193,9 @@
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-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.1.1.tgz",
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+      "version": "2.1.7",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.1.7.tgz",
+      "integrity": "sha512-uZbew1NqdmPDTMJ8ah1y+b+9QEJrfkXFk3RcTQw3X0jW/xRUvFKsg1CfQdSYGdTbXZWExtU3J3ccxtnfw1Fi0g==",
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@@ -6406,10 +6409,20 @@
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-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.1.1.tgz",
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+      "version": "4.3.2",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.3.2.tgz",
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       "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/puzrin"
+        },
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/nodeca"
+        }
+      ],
       "license": "MIT",
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@@ -6748,11 +6761,14 @@
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-      "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.27.tgz",
-      "integrity": "sha512-nmh3lCkYZ3grZvqcCH+fjmQ7X+H0OeZgP40OierEaAptX4XofMh5kwNbWh7lBduUzCcV/8kZ+NDLCwm2iorIlA==",
+      "version": "2.0.60",
+      "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.60.tgz",
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       "dev": true,
-      "license": "MIT"
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
     },
     "node_modules/normalize-path": {
       "version": "3.0.0",
@@ -7111,9 +7127,9 @@
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-      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz",
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+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.2.tgz",
+      "integrity": "sha512-V7+vQEJ06Z+c5tSye8S+nHUfI51xoXIXjHQ99cQtKUkQqqO1kO/KCJUfZXuB47h/YBlDhah2H3hdUGXn8ie0oA==",
       "dev": true,
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@@ -8444,9 +8460,9 @@
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-      "resolved": "https://registry.npmjs.org/undici/-/undici-6.27.0.tgz",
-      "integrity": "sha512-YmfV3YnEDzXRC5lZ2jWtWWHKGUm1zIt8AhesR1tens+HTNv+YZlN/dp6G727LOvMJ8xjP9Be7Y2Sdr96LDm+pg==",
+      "version": "6.29.1",
+      "resolved": "https://registry.npmjs.org/undici/-/undici-6.29.1.tgz",
+      "integrity": "sha512-EvRlUt/QqAEvXdQeRMYUfwOQsfzpDztykrG2owGEE/rBOBoYv9uF39ZzsNDh4lTFHhTr2XOZjKkYgueD12ZmGA==",
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@@ -8498,9 +8514,9 @@
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+      "version": "1.3.4",
+      "resolved": "https://registry.npmjs.org/update-browserslist-db/-/update-browserslist-db-1.3.4.tgz",
+      "integrity": "sha512-t8wonIOdQyOjtPd2VktlBu6QjTVTks6v8bSi7kd0r2Vll8TK1JYDZtRRdbmCHOAMphkZgrzK+L+vXK4pyZ8t4A==",
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diff --git a/package.json b/package.json
index e7266ae..ffd23d8 100644
--- a/package.json
+++ b/package.json
@@ -51,5 +51,17 @@
   },
   "engines": {
     "node": ">=24"
+  },
+  "overrides": {
+    "brace-expansion@1": "1.1.21",
+    "undici@6": "6.29.1",
+    "@babel/core@7": "7.29.7",
+    "baseline-browser-mapping@2": "2.11.33",
+    "brace-expansion@2": "2.1.7",
+    "browserslist@4": "4.29.5",
+    "handlebars@4": "4.7.10",
+    "js-yaml@3": "3.15.2",
+    "js-yaml@4": "4.3.2",
+    "picomatch@2": "2.3.2"
   }
 }