diff --git a/deps/undici/src/lib/core/connect.js b/deps/undici/src/lib/core/connect.js
index 8ab21fcd5fc..8cd8abccc54 100644
--- a/deps/undici/src/lib/core/connect.js
+++ b/deps/undici/src/lib/core/connect.js
@@ -220,6 +220,11 @@ const setupConnectTimeout = process.platform === 'win32'
  * @param {number} opts.port
  */
 function onConnectTimeout (socket, opts) {
+  // The socket could be already garbage collected
+  if (socket == null) {
+    return
+  }
+
   let message = 'Connect Timeout Error'
   if (Array.isArray(socket.autoSelectFamilyAttemptedAddresses)) {
     message += ` (attempted addresses: ${socket.autoSelectFamilyAttemptedAddresses.join(', ')},`
diff --git a/deps/undici/src/lib/handler/retry-handler.js b/deps/undici/src/lib/handler/retry-handler.js
index e00e82faf08..5d1ccf00538 100644
--- a/deps/undici/src/lib/handler/retry-handler.js
+++ b/deps/undici/src/lib/handler/retry-handler.js
@@ -229,7 +229,7 @@ class RetryHandler {
         return false
       }
 
-      const { start, size, end = size } = contentRange
+      const { start, size, end = size - 1 } = contentRange
 
       assert(this.start === start, 'content-range mismatch')
       assert(this.end == null || this.end === end, 'content-range mismatch')
@@ -252,7 +252,7 @@ class RetryHandler {
           )
         }
 
-        const { start, size, end = size } = range
+        const { start, size, end = size - 1 } = range
         assert(
           start != null && Number.isFinite(start),
           'content-range mismatch'
@@ -266,7 +266,7 @@ class RetryHandler {
       // We make our best to checkpoint the body for further range headers
       if (this.end == null) {
         const contentLength = headers['content-length']
-        this.end = contentLength != null ? Number(contentLength) : null
+        this.end = contentLength != null ? Number(contentLength) - 1 : null
       }
 
       assert(Number.isFinite(this.start))
diff --git a/deps/undici/src/lib/llhttp/wasm_build_env.txt b/deps/undici/src/lib/llhttp/wasm_build_env.txt
index 34b1ec41bd9..7c670454492 100644
--- a/deps/undici/src/lib/llhttp/wasm_build_env.txt
+++ b/deps/undici/src/lib/llhttp/wasm_build_env.txt
@@ -1,12 +1,12 @@
 
-> undici@6.20.1 prebuild:wasm
+> undici@6.21.0 prebuild:wasm
 > node build/wasm.js --prebuild
 
 > docker build --platform=linux/x86_64 -t llhttp_wasm_builder -f /home/runner/work/node/node/deps/undici/src/build/Dockerfile /home/runner/work/node/node/deps/undici/src
 
 
 
-> undici@6.20.1 build:wasm
+> undici@6.21.0 build:wasm
 > node build/wasm.js --docker
 
 > docker run --rm -t --platform=linux/x86_64 --user 1001:127 --mount type=bind,source=/home/runner/work/node/node/deps/undici/src/lib/llhttp,target=/home/node/undici/lib/llhttp llhttp_wasm_builder node build/wasm.js
diff --git a/deps/undici/src/lib/web/cache/cache.js b/deps/undici/src/lib/web/cache/cache.js
index 45c6fec3467..1c1a5911242 100644
--- a/deps/undici/src/lib/web/cache/cache.js
+++ b/deps/undici/src/lib/web/cache/cache.js
@@ -37,6 +37,7 @@ class Cache {
       webidl.illegalConstructor()
     }
 
+    webidl.util.markAsUncloneable(this)
     this.#relevantRequestResponseList = arguments[1]
   }
 
diff --git a/deps/undici/src/lib/web/cache/cachestorage.js b/deps/undici/src/lib/web/cache/cachestorage.js
index cc773b94b49..55dba352e99 100644
--- a/deps/undici/src/lib/web/cache/cachestorage.js
+++ b/deps/undici/src/lib/web/cache/cachestorage.js
@@ -16,6 +16,8 @@ class CacheStorage {
     if (arguments[0] !== kConstruct) {
       webidl.illegalConstructor()
     }
+
+    webidl.util.markAsUncloneable(this)
   }
 
   async match (request, options = {}) {
diff --git a/deps/undici/src/lib/web/eventsource/eventsource.js b/deps/undici/src/lib/web/eventsource/eventsource.js
index 51634c1779f..5a488ffce27 100644
--- a/deps/undici/src/lib/web/eventsource/eventsource.js
+++ b/deps/undici/src/lib/web/eventsource/eventsource.js
@@ -105,6 +105,8 @@ class EventSource extends EventTarget {
     // 1. Let ev be a new EventSource object.
     super()
 
+    webidl.util.markAsUncloneable(this)
+
     const prefix = 'EventSource constructor'
     webidl.argumentLengthCheck(arguments, 1, prefix)
 
diff --git a/deps/undici/src/lib/web/fetch/formdata.js b/deps/undici/src/lib/web/fetch/formdata.js
index 94a84b03ab3..544e4125519 100644
--- a/deps/undici/src/lib/web/fetch/formdata.js
+++ b/deps/undici/src/lib/web/fetch/formdata.js
@@ -14,6 +14,8 @@ const File = globalThis.File ?? NativeFile
 // https://xhr.spec.whatwg.org/#formdata
 class FormData {
   constructor (form) {
+    webidl.util.markAsUncloneable(this)
+
     if (form !== undefined) {
       throw webidl.errors.conversionFailed({
         prefix: 'FormData constructor',
diff --git a/deps/undici/src/lib/web/fetch/headers.js b/deps/undici/src/lib/web/fetch/headers.js
index 816aceacce4..a68daf4a5d4 100644
--- a/deps/undici/src/lib/web/fetch/headers.js
+++ b/deps/undici/src/lib/web/fetch/headers.js
@@ -359,6 +359,8 @@ class Headers {
   #headersList
 
   constructor (init = undefined) {
+    webidl.util.markAsUncloneable(this)
+
     if (init === kConstruct) {
       return
     }
diff --git a/deps/undici/src/lib/web/fetch/index.js b/deps/undici/src/lib/web/fetch/index.js
index 3c7ca211c99..b74ccf9deb8 100644
--- a/deps/undici/src/lib/web/fetch/index.js
+++ b/deps/undici/src/lib/web/fetch/index.js
@@ -2137,7 +2137,7 @@ async function httpNetworkFetch (
 
           // https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Encoding
           if (codings.length !== 0 && request.method !== 'HEAD' && request.method !== 'CONNECT' && !nullBodyStatus.includes(status) && !willFollow) {
-            for (let i = 0; i < codings.length; ++i) {
+            for (let i = codings.length - 1; i >= 0; --i) {
               const coding = codings[i]
               // https://www.rfc-editor.org/rfc/rfc9112.html#section-7.2
               if (coding === 'x-gzip' || coding === 'gzip') {
diff --git a/deps/undici/src/lib/web/fetch/request.js b/deps/undici/src/lib/web/fetch/request.js
index 542ea7fb28a..ee3ce488774 100644
--- a/deps/undici/src/lib/web/fetch/request.js
+++ b/deps/undici/src/lib/web/fetch/request.js
@@ -82,6 +82,7 @@ let patchMethodWarning = false
 class Request {
   // https://fetch.spec.whatwg.org/#dom-request
   constructor (input, init = {}) {
+    webidl.util.markAsUncloneable(this)
     if (input === kConstruct) {
       return
     }
diff --git a/deps/undici/src/lib/web/fetch/response.js b/deps/undici/src/lib/web/fetch/response.js
index 155dbadd1ad..3b6af35fbed 100644
--- a/deps/undici/src/lib/web/fetch/response.js
+++ b/deps/undici/src/lib/web/fetch/response.js
@@ -110,6 +110,7 @@ class Response {
 
   // https://fetch.spec.whatwg.org/#dom-response
   constructor (body = null, init = {}) {
+    webidl.util.markAsUncloneable(this)
     if (body === kConstruct) {
       return
     }
diff --git a/deps/undici/src/lib/web/fetch/webidl.js b/deps/undici/src/lib/web/fetch/webidl.js
index 13cafae6f1b..cd5cb14454c 100644
--- a/deps/undici/src/lib/web/fetch/webidl.js
+++ b/deps/undici/src/lib/web/fetch/webidl.js
@@ -1,6 +1,7 @@
 'use strict'
 
 const { types, inspect } = require('node:util')
+const { markAsUncloneable } = require('node:worker_threads')
 const { toUSVString } = require('../../core/util')
 
 /** @type {import('../../../types/webidl').Webidl} */
@@ -86,6 +87,7 @@ webidl.util.Type = function (V) {
   }
 }
 
+webidl.util.markAsUncloneable = markAsUncloneable || (() => {})
 // https://webidl.spec.whatwg.org/#abstract-opdef-converttoint
 webidl.util.ConvertToInt = function (V, bitLength, signedness, opts) {
   let upperBound
diff --git a/deps/undici/src/lib/web/websocket/events.js b/deps/undici/src/lib/web/websocket/events.js
index 760b7297359..f899c21d42b 100644
--- a/deps/undici/src/lib/web/websocket/events.js
+++ b/deps/undici/src/lib/web/websocket/events.js
@@ -14,6 +14,7 @@ class MessageEvent extends Event {
   constructor (type, eventInitDict = {}) {
     if (type === kConstruct) {
       super(arguments[1], arguments[2])
+      webidl.util.markAsUncloneable(this)
       return
     }
 
@@ -26,6 +27,7 @@ class MessageEvent extends Event {
     super(type, eventInitDict)
 
     this.#eventInit = eventInitDict
+    webidl.util.markAsUncloneable(this)
   }
 
   get data () {
@@ -112,6 +114,7 @@ class CloseEvent extends Event {
     super(type, eventInitDict)
 
     this.#eventInit = eventInitDict
+    webidl.util.markAsUncloneable(this)
   }
 
   get wasClean () {
@@ -142,6 +145,7 @@ class ErrorEvent extends Event {
     webidl.argumentLengthCheck(arguments, 1, prefix)
 
     super(type, eventInitDict)
+    webidl.util.markAsUncloneable(this)
 
     type = webidl.converters.DOMString(type, prefix, 'type')
     eventInitDict = webidl.converters.ErrorEventInit(eventInitDict ?? {})
diff --git a/deps/undici/src/lib/web/websocket/websocket.js b/deps/undici/src/lib/web/websocket/websocket.js
index 109d7be2e2f..e4053024756 100644
--- a/deps/undici/src/lib/web/websocket/websocket.js
+++ b/deps/undici/src/lib/web/websocket/websocket.js
@@ -51,6 +51,8 @@ class WebSocket extends EventTarget {
   constructor (url, protocols = []) {
     super()
 
+    webidl.util.markAsUncloneable(this)
+
     const prefix = 'WebSocket constructor'
     webidl.argumentLengthCheck(arguments, 1, prefix)
 
diff --git a/deps/undici/src/package-lock.json b/deps/undici/src/package-lock.json
index 6fa67341818..ea5f5e65ac0 100644
--- a/deps/undici/src/package-lock.json
+++ b/deps/undici/src/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "undici",
-  "version": "6.20.1",
+  "version": "6.21.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "undici",
-      "version": "6.20.1",
+      "version": "6.21.0",
       "license": "MIT",
       "devDependencies": {
         "@fastify/busboy": "2.1.1",
@@ -92,13 +92,14 @@
       }
     },
     "node_modules/@babel/code-frame": {
-      "version": "7.25.9",
-      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.25.9.tgz",
-      "integrity": "sha512-z88xeGxnzehn2sqZ8UdGQEvYErF1odv2CftxInpSYJt6uHuPe9YjahKZITGs3l5LeI9d2ROG+obuDAoSlqbNfQ==",
+      "version": "7.26.2",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.26.2.tgz",
+      "integrity": "sha512-RJlIHRueQgwWitWgF8OdFYGZX328Ax5BCemNGlqHfplnRT9ESi8JkFlvaVYbS+UubVY6dpv87Fs2u5M29iNFVQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@babel/highlight": "^7.25.9",
+        "@babel/helper-validator-identifier": "^7.25.9",
+        "js-tokens": "^4.0.0",
         "picocolors": "^1.0.0"
       },
       "engines": {
@@ -106,9 +107,9 @@
       }
     },
     "node_modules/@babel/compat-data": {
-      "version": "7.25.9",
-      "resolved": "https://registry.npmjs.org/@babel/compat-data/-/compat-data-7.25.9.tgz",
-      "integrity": "sha512-yD+hEuJ/+wAJ4Ox2/rpNv5HIuPG82x3ZlQvYVn8iYCprdxzE7P1udpGF1jyjQVBU4dgznN+k2h103vxZ7NdPyw==",
+      "version": "7.26.2",
+      "resolved": "https://registry.npmjs.org/@babel/compat-data/-/compat-data-7.26.2.tgz",
+      "integrity": "sha512-Z0WgzSEa+aUcdiJuCIqgujCshpMWgUpgOxXotrYPSA53hA3qopNaqcJpyr0hVb1FeWdnqFA35/fUtXgBK8srQg==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -116,22 +117,22 @@
       }
     },
     "node_modules/@babel/core": {
-      "version": "7.25.9",
-      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.25.9.tgz",
-      "integrity": "sha512-WYvQviPw+Qyib0v92AwNIrdLISTp7RfDkM7bPqBvpbnhY4wq8HvHBZREVdYDXk98C8BkOIVnHAY3yvj7AVISxQ==",
+      "version": "7.26.0",
+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.26.0.tgz",
+      "integrity": "sha512-i1SLeK+DzNnQ3LL/CswPCa/E5u4lh1k6IAEphON8F+cXt0t9euTshDru0q7/IqMa1PMPz5RnHuHscF8/ZJsStg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
         "@ampproject/remapping": "^2.2.0",
-        "@babel/code-frame": "^7.25.9",
-        "@babel/generator": "^7.25.9",
+        "@babel/code-frame": "^7.26.0",
+        "@babel/generator": "^7.26.0",
         "@babel/helper-compilation-targets": "^7.25.9",
-        "@babel/helper-module-transforms": "^7.25.9",
-        "@babel/helpers": "^7.25.9",
-        "@babel/parser": "^7.25.9",
+        "@babel/helper-module-transforms": "^7.26.0",
+        "@babel/helpers": "^7.26.0",
+        "@babel/parser": "^7.26.0",
         "@babel/template": "^7.25.9",
         "@babel/traverse": "^7.25.9",
-        "@babel/types": "^7.25.9",
+        "@babel/types": "^7.26.0",
         "convert-source-map": "^2.0.0",
         "debug": "^4.1.0",
         "gensync": "^1.0.0-beta.2",
@@ -147,13 +148,14 @@
       }
     },
     "node_modules/@babel/generator": {
-      "version": "7.25.9",
-      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.25.9.tgz",
-      "integrity": "sha512-omlUGkr5EaoIJrhLf9CJ0TvjBRpd9+AXRG//0GEQ9THSo8wPiTlbpy1/Ow8ZTrbXpjd9FHXfbFQx32I04ht0FA==",
+      "version": "7.26.2",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.26.2.tgz",
+      "integrity": "sha512-zevQbhbau95nkoxSq3f/DC/SC+EEOUZd3DYqfSkMhY2/wfSeaHV1Ew4vk8e+x8lja31IbyuUa2uQ3JONqKbysw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@babel/types": "^7.25.9",
+        "@babel/parser": "^7.26.2",
+        "@babel/types": "^7.26.0",
         "@jridgewell/gen-mapping": "^0.3.5",
         "@jridgewell/trace-mapping": "^0.3.25",
         "jsesc": "^3.0.2"
@@ -194,14 +196,13 @@
       }
     },
     "node_modules/@babel/helper-module-transforms": {
-      "version": "7.25.9",
-      "resolved": "https://registry.npmjs.org/@babel/helper-module-transforms/-/helper-module-transforms-7.25.9.tgz",
-      "integrity": "sha512-TvLZY/F3+GvdRYFZFyxMvnsKi+4oJdgZzU3BoGN9Uc2d9C6zfNwJcKKhjqLAhK8i46mv93jsO74fDh3ih6rpHA==",
+      "version": "7.26.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-module-transforms/-/helper-module-transforms-7.26.0.tgz",
+      "integrity": "sha512-xO+xu6B5K2czEnQye6BHA7DolFFmS3LB7stHZFaOLb1pAwO1HWLS8fXA+eh0A2yIvltPVmx3eNNDBJA2SLHXFw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
         "@babel/helper-module-imports": "^7.25.9",
-        "@babel/helper-simple-access": "^7.25.9",
         "@babel/helper-validator-identifier": "^7.25.9",
         "@babel/traverse": "^7.25.9"
       },
@@ -222,20 +223,6 @@
         "node": ">=6.9.0"
       }
     },
-    "node_modules/@babel/helper-simple-access": {
-      "version": "7.25.9",
-      "resolved": "https://registry.npmjs.org/@babel/helper-simple-access/-/helper-simple-access-7.25.9.tgz",
-      "integrity": "sha512-c6WHXuiaRsJTyHYLJV75t9IqsmTbItYfdj99PnzYGQZkYKvan5/2jKJ7gu31J3/BJ/A18grImSPModuyG/Eo0Q==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "@babel/traverse": "^7.25.9",
-        "@babel/types": "^7.25.9"
-      },
-      "engines": {
-        "node": ">=6.9.0"
-      }
-    },
     "node_modules/@babel/helper-string-parser": {
       "version": "7.25.9",
       "resolved": "https://registry.npmjs.org/@babel/helper-string-parser/-/helper-string-parser-7.25.9.tgz",
@@ -267,121 +254,27 @@
       }
     },
     "node_modules/@babel/helpers": {
-      "version": "7.25.9",
-      "resolved": "https://registry.npmjs.org/@babel/helpers/-/helpers-7.25.9.tgz",
-      "integrity": "sha512-oKWp3+usOJSzDZOucZUAMayhPz/xVjzymyDzUN8dk0Wd3RWMlGLXi07UCQ/CgQVb8LvXx3XBajJH4XGgkt7H7g==",
+      "version": "7.26.0",
+      "resolved": "https://registry.npmjs.org/@babel/helpers/-/helpers-7.26.0.tgz",
+      "integrity": "sha512-tbhNuIxNcVb21pInl3ZSjksLCvgdZy9KwJ8brv993QtIVKJBBkYXz4q4ZbAv31GdnC+R90np23L5FbEBlthAEw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
         "@babel/template": "^7.25.9",
-        "@babel/types": "^7.25.9"
+        "@babel/types": "^7.26.0"
       },
       "engines": {
         "node": ">=6.9.0"
       }
     },
-    "node_modules/@babel/highlight": {
-      "version": "7.25.9",
-      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.25.9.tgz",
-      "integrity": "sha512-llL88JShoCsth8fF8R4SJnIn+WLvR6ccFxu1H3FlMhDontdcmZWf2HgIZ7AIqV3Xcck1idlohrN4EUBQz6klbw==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "@babel/helper-validator-identifier": "^7.25.9",
-        "chalk": "^2.4.2",
-        "js-tokens": "^4.0.0",
-        "picocolors": "^1.0.0"
-      },
-      "engines": {
-        "node": ">=6.9.0"
-      }
-    },
-    "node_modules/@babel/highlight/node_modules/ansi-styles": {
-      "version": "3.2.1",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
-      "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "color-convert": "^1.9.0"
-      },
-      "engines": {
-        "node": ">=4"
-      }
-    },
-    "node_modules/@babel/highlight/node_modules/chalk": {
-      "version": "2.4.2",
-      "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
-      "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "ansi-styles": "^3.2.1",
-        "escape-string-regexp": "^1.0.5",
-        "supports-color": "^5.3.0"
-      },
-      "engines": {
-        "node": ">=4"
-      }
-    },
-    "node_modules/@babel/highlight/node_modules/color-convert": {
-      "version": "1.9.3",
-      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
-      "integrity": "sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "color-name": "1.1.3"
-      }
-    },
-    "node_modules/@babel/highlight/node_modules/color-name": {
-      "version": "1.1.3",
-      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
-      "integrity": "sha512-72fSenhMw2HZMTVHeCA9KCmpEIbzWiQsjN+BHcBbS9vr1mtt+vJjPdksIBNUmKAW8TFUDPJK5SUU3QhE9NEXDw==",
-      "dev": true,
-      "license": "MIT"
-    },
-    "node_modules/@babel/highlight/node_modules/escape-string-regexp": {
-      "version": "1.0.5",
-      "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
-      "integrity": "sha512-vbRorB5FUQWvla16U8R/qgaFIya2qGzwDrNmCZuYKrbdSUMG6I1ZCGQRefkRVhuOkIGVne7BQ35DSfo1qvJqFg==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": ">=0.8.0"
-      }
-    },
-    "node_modules/@babel/highlight/node_modules/has-flag": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
-      "integrity": "sha512-sKJf1+ceQBr4SMkvQnBDNDtf4TXpVhVGateu0t918bl30FnbE2m4vNLX+VWe/dpjlb+HugGYzW7uQXH98HPEYw==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": ">=4"
-      }
-    },
-    "node_modules/@babel/highlight/node_modules/supports-color": {
-      "version": "5.5.0",
-      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
-      "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "has-flag": "^3.0.0"
-      },
-      "engines": {
-        "node": ">=4"
-      }
-    },
     "node_modules/@babel/parser": {
-      "version": "7.25.9",
-      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.25.9.tgz",
-      "integrity": "sha512-aI3jjAAO1fh7vY/pBGsn1i9LDbRP43+asrRlkPuTXW5yHXtd1NgTEMudbBoDDxrf1daEEfPJqR+JBMakzrR4Dg==",
+      "version": "7.26.2",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.26.2.tgz",
+      "integrity": "sha512-DWMCZH9WA4Maitz2q21SRKHo9QXZxkDsbNZoVD62gusNtNBBqDg9i7uOhASfTfIGNzW+O+r7+jAlM8dwphcJKQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@babel/types": "^7.25.9"
+        "@babel/types": "^7.26.0"
       },
       "bin": {
         "parser": "bin/babel-parser.js"
@@ -446,9 +339,9 @@
       }
     },
     "node_modules/@babel/plugin-syntax-import-attributes": {
-      "version": "7.25.9",
-      "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-import-attributes/-/plugin-syntax-import-attributes-7.25.9.tgz",
-      "integrity": "sha512-u3EN9ub8LyYvgTnrgp8gboElouayiwPdnM7x5tcnW3iSt09/lQYPwMNK40I9IUxo7QOZhAsPHCmmuO7EPdruqg==",
+      "version": "7.26.0",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-syntax-import-attributes/-/plugin-syntax-import-attributes-7.26.0.tgz",
+      "integrity": "sha512-e2dttdsJ1ZTpi3B9UYGLw41hifAubg19AtCu/2I/F1QNVclOBr1dYpTdmdyZ84Xiz43BS/tCUkMAZNLv12Pi+A==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -664,9 +557,9 @@
       }
     },
     "node_modules/@babel/types": {
-      "version": "7.25.9",
-      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.25.9.tgz",
-      "integrity": "sha512-OwS2CM5KocvQ/k7dFJa8i5bNGJP0hXWfVCfDkqRFP1IreH1JDC7wG6eCYCi0+McbfT8OR/kNqsI0UU0xP9H6PQ==",
+      "version": "7.26.0",
+      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.26.0.tgz",
+      "integrity": "sha512-Z/yiTPj+lDVnF7lWeKCIJzaIkI0vYO87dMpZ4bg4TDrFe4XXLFWL1TbXU27gBP3QccxV9mZICCrnjnYlJjXHOA==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -685,25 +578,28 @@
       "license": "MIT"
     },
     "node_modules/@eslint-community/eslint-utils": {
-      "version": "4.4.0",
-      "resolved": "https://registry.npmjs.org/@eslint-community/eslint-utils/-/eslint-utils-4.4.0.tgz",
-      "integrity": "sha512-1/sA4dwrzBAyeUoQ6oxahHKmrZvsnLCg4RfxW3ZFGGmQkSNQPFNLV9CUEFQP1x9EYXHTo5p6xdhZM1Ne9p/AfA==",
+      "version": "4.4.1",
+      "resolved": "https://registry.npmjs.org/@eslint-community/eslint-utils/-/eslint-utils-4.4.1.tgz",
+      "integrity": "sha512-s3O3waFUrMV8P/XaF/+ZTp1X9XBZW1a4B97ZnjQF2KYWaFD2A8KyFBsrsfSjEmjn3RGWAIuvlneuZm3CUK3jbA==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "eslint-visitor-keys": "^3.3.0"
+        "eslint-visitor-keys": "^3.4.3"
       },
       "engines": {
         "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
       },
+      "funding": {
+        "url": "https://opencollective.com/eslint"
+      },
       "peerDependencies": {
         "eslint": "^6.0.0 || ^7.0.0 || >=8.0.0"
       }
     },
     "node_modules/@eslint-community/regexpp": {
-      "version": "4.11.1",
-      "resolved": "https://registry.npmjs.org/@eslint-community/regexpp/-/regexpp-4.11.1.tgz",
-      "integrity": "sha512-m4DVN9ZqskZoLU5GlWZadwDnYo3vAEydiUayB9widCl9ffWx2IvPnp6n3on5rJmziJSw9Bv+Z3ChDVdMwXCY8Q==",
+      "version": "4.12.1",
+      "resolved": "https://registry.npmjs.org/@eslint-community/regexpp/-/regexpp-4.12.1.tgz",
+      "integrity": "sha512-CCZCDJuduB9OUkFkY2IgppNZMi2lBQgD2qzwXkEia16cge2pijY/aXi96CJMquDMn3nJdlPV1A5KrJEXwfLNzQ==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -1687,9 +1583,9 @@
       "license": "MIT"
     },
     "node_modules/@types/node": {
-      "version": "18.19.59",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.19.59.tgz",
-      "integrity": "sha512-vizm2EqwV/7Zay+A6J3tGl9Lhr7CjZe2HmWS988sefiEmsyP9CeXEleho6i4hJk/8UtZAo0bWN4QPZZr83RxvQ==",
+      "version": "18.19.64",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.19.64.tgz",
+      "integrity": "sha512-955mDqvO2vFf/oL7V3WiUtiz+BugyX8uVbaT2H8oj3+8dRyH2FLiNdowe7eNqRM7IOIZvzDH76EoAT+gwm6aIQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -1758,9 +1654,9 @@
       }
     },
     "node_modules/acorn": {
-      "version": "8.13.0",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.13.0.tgz",
-      "integrity": "sha512-8zSiw54Oxrdym50NlZ9sUusyO1Z1ZchgRLWRaK6c86XJFClyCgFKetdowBg5bKxyp/u+CDBJG4Mpp0m3HLZl9w==",
+      "version": "8.14.0",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.14.0.tgz",
+      "integrity": "sha512-cl669nCJTZBsL97OF4kUQm5g5hC2uihk0NxY3WENAC0TYdILVkAyHymAntgxGkl7K+t0cXIrH5siy5S4XkFycA==",
       "dev": true,
       "license": "MIT",
       "bin": {
@@ -2649,9 +2545,9 @@
       }
     },
     "node_modules/caniuse-lite": {
-      "version": "1.0.30001669",
-      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001669.tgz",
-      "integrity": "sha512-DlWzFDJqstqtIVx1zeSpIMLjunf5SmwOw0N2Ck/QSQdS8PLS4+9HrLaYei4w8BIAL7IB/UEDu889d8vhCTPA0w==",
+      "version": "1.0.30001680",
+      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001680.tgz",
+      "integrity": "sha512-rPQy70G6AGUMnbwS1z6Xg+RkHYPAi18ihs47GH0jcxIG7wArmPgY3XbS2sRdBbxJljp3thdT8BIqv9ccCypiPA==",
       "dev": true,
       "funding": [
         {
@@ -2967,9 +2863,9 @@
       }
     },
     "node_modules/cross-spawn": {
-      "version": "7.0.3",
-      "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.3.tgz",
-      "integrity": "sha512-iRDPJKUPVEND7dHPO8rkbOnPpyDygcDFtWjpeWNCgy8WP2rXcxXL8TskReQl6OrB2G7+UJrags1q15Fudc7G6w==",
+      "version": "7.0.5",
+      "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.5.tgz",
+      "integrity": "sha512-ZVJrKKYunU38/76t0RMOulHOnUcbU9GbpWKAOZ0mhjr7CX6FVrH+4FrAapSOekrgFQ3f/8gwMEuIft0aKq6Hug==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -3269,9 +3165,9 @@
       "license": "MIT"
     },
     "node_modules/electron-to-chromium": {
-      "version": "1.5.43",
-      "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.5.43.tgz",
-      "integrity": "sha512-NxnmFBHDl5Sachd2P46O7UJiMaMHMLSofoIWVJq3mj8NJgG0umiSeljAVP9lGzjI0UDLJJ5jjoGjcrB8RSbjLQ==",
+      "version": "1.5.58",
+      "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.5.58.tgz",
+      "integrity": "sha512-al2l4r+24ZFL7WzyPTlyD0fC33LLzvxqLCwurtBibVPghRGO9hSTl+tis8t1kD7biPiH/en4U0I7o/nQbYeoVA==",
       "dev": true,
       "license": "ISC"
     },
@@ -3319,9 +3215,9 @@
       }
     },
     "node_modules/es-abstract": {
-      "version": "1.23.3",
-      "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.23.3.tgz",
-      "integrity": "sha512-e+HfNH61Bj1X9/jLc5v1owaLYuHdeHHSQlkhCBiTK8rBvKaULl/beGMxwrMXjpYrv4pz22BlY570vVePA2ho4A==",
+      "version": "1.23.4",
+      "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.23.4.tgz",
+      "integrity": "sha512-HR1gxH5OaiN7XH7uiWH0RLw0RcFySiSoW1ctxmD1ahTw3uGBtkmm/ng0tDU1OtYx5OK6EOL5Y6O21cDflG3Jcg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -3340,7 +3236,7 @@
         "function.prototype.name": "^1.1.6",
         "get-intrinsic": "^1.2.4",
         "get-symbol-description": "^1.0.2",
-        "globalthis": "^1.0.3",
+        "globalthis": "^1.0.4",
         "gopd": "^1.0.1",
         "has-property-descriptors": "^1.0.2",
         "has-proto": "^1.0.3",
@@ -3356,10 +3252,10 @@
         "is-string": "^1.0.7",
         "is-typed-array": "^1.1.13",
         "is-weakref": "^1.0.2",
-        "object-inspect": "^1.13.1",
+        "object-inspect": "^1.13.3",
         "object-keys": "^1.1.1",
         "object.assign": "^4.1.5",
-        "regexp.prototype.flags": "^1.5.2",
+        "regexp.prototype.flags": "^1.5.3",
         "safe-array-concat": "^1.1.2",
         "safe-regex-test": "^1.0.3",
         "string.prototype.trim": "^1.2.9",
@@ -3403,9 +3299,9 @@
       }
     },
     "node_modules/es-iterator-helpers": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/es-iterator-helpers/-/es-iterator-helpers-1.1.0.tgz",
-      "integrity": "sha512-/SurEfycdyssORP/E+bj4sEu1CWw4EmLDsHynHwSXQ7utgbrMRWW195pTrCjFgFCddf/UkYm3oqKPRq5i8bJbw==",
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/es-iterator-helpers/-/es-iterator-helpers-1.2.0.tgz",
+      "integrity": "sha512-tpxqxncxnpw3c93u8n3VOzACmRFoVmWJqbWXvX/JfKbkhBw1oslgPrUfeSt2psuqyEJFD6N/9lg5i7bsKpoq+Q==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -3417,6 +3313,7 @@
         "function-bind": "^1.1.2",
         "get-intrinsic": "^1.2.4",
         "globalthis": "^1.0.4",
+        "gopd": "^1.0.1",
         "has-property-descriptors": "^1.0.2",
         "has-proto": "^1.0.3",
         "has-symbols": "^1.0.3",
@@ -4401,9 +4298,9 @@
       }
     },
     "node_modules/fast-check": {
-      "version": "3.22.0",
-      "resolved": "https://registry.npmjs.org/fast-check/-/fast-check-3.22.0.tgz",
-      "integrity": "sha512-8HKz3qXqnHYp/VCNn2qfjHdAdcI8zcSqOyX64GOMukp7SL2bfzfeDKjSd+UyECtejccaZv3LcvZTm9YDD22iCQ==",
+      "version": "3.23.1",
+      "resolved": "https://registry.npmjs.org/fast-check/-/fast-check-3.23.1.tgz",
+      "integrity": "sha512-u/MudsoQEgBUZgR5N1v87vEgybeVYus9VnDVaIkxkkGP2jt54naghQ3PCQHJiogS8U/GavZCUPFfx3Xkp+NaHw==",
       "dev": true,
       "funding": [
         {
@@ -7284,9 +7181,9 @@
       }
     },
     "node_modules/object-inspect": {
-      "version": "1.13.2",
-      "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.13.2.tgz",
-      "integrity": "sha512-IRZSRuzJiynemAXPYtPe5BoI/RESNYR7TYm50MC5Mqbd3Jmw5y790sErYw3V6SryFJD64b74qQQs9wn5Bg/k3g==",
+      "version": "1.13.3",
+      "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.13.3.tgz",
+      "integrity": "sha512-kDCGIbxkDSXE3euJZZXzc6to7fCrKHNI/hSRQnRuQ+BWjFNzZwiFF8fj/6o2t2G9/jTj8PSIYTfCLelLZEeRpA==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -7556,9 +7453,9 @@
       }
     },
     "node_modules/parse5": {
-      "version": "7.2.0",
-      "resolved": "https://registry.npmjs.org/parse5/-/parse5-7.2.0.tgz",
-      "integrity": "sha512-ZkDsAOcxsUMZ4Lz5fVciOehNcJ+Gb8gTzcA4yl3wnc273BAybYWrQ+Ks/OjCjSEpjvQkDSeZbybK9qj2VHHdGA==",
+      "version": "7.2.1",
+      "resolved": "https://registry.npmjs.org/parse5/-/parse5-7.2.1.tgz",
+      "integrity": "sha512-BuBYQYlv1ckiPdQi/ohiivi9Sagc9JG+Ozs0r7b/0iK3sKmrb0b9FdWdBbOdx6hBCM/F9Ir82ofnBhtZOjCRPQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -8047,11 +7944,14 @@
       "license": "ISC"
     },
     "node_modules/psl": {
-      "version": "1.9.0",
-      "resolved": "https://registry.npmjs.org/psl/-/psl-1.9.0.tgz",
-      "integrity": "sha512-E/ZsdU4HLs/68gYzgGTkMicWTLPdAftJLfJFlLUAAKZGkStNU72sZjT66SnMDVOfOWY/YAoiD7Jxa9iHvngcag==",
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/psl/-/psl-1.10.0.tgz",
+      "integrity": "sha512-KSKHEbjAnpUuAUserOq0FxGXCUrzC3WniuSJhvdbs102rL55266ZcHBqLWOsG30spQMlPdpy7icATiAQehg/iA==",
       "dev": true,
-      "license": "MIT"
+      "license": "MIT",
+      "dependencies": {
+        "punycode": "^2.3.1"
+      }
     },
     "node_modules/punycode": {
       "version": "2.3.1",
diff --git a/deps/undici/src/package.json b/deps/undici/src/package.json
index 97535702e65..021466738c9 100644
--- a/deps/undici/src/package.json
+++ b/deps/undici/src/package.json
@@ -1,6 +1,6 @@
 {
   "name": "undici",
-  "version": "6.20.1",
+  "version": "6.21.0",
   "description": "An HTTP/1.1 client, written from scratch for Node.js",
   "homepage": "https://undici.nodejs.org",
   "bugs": {
diff --git a/deps/undici/src/types/webidl.d.ts b/deps/undici/src/types/webidl.d.ts
index 8a23a85bf01..fd83b68af90 100644
--- a/deps/undici/src/types/webidl.d.ts
+++ b/deps/undici/src/types/webidl.d.ts
@@ -67,6 +67,12 @@ interface WebidlUtil {
    * Stringifies {@param V}
    */
   Stringify (V: any): string
+
+  /**
+   * Mark a value as uncloneable for Node.js.
+   * This is only effective in some newer Node.js versions.
+   */
+  markAsUncloneable (V: any): void
 }
 
 interface WebidlConverters {
diff --git a/deps/undici/undici.js b/deps/undici/undici.js
index 1a2312842a6..1ae9f5a173a 100644
--- a/deps/undici/undici.js
+++ b/deps/undici/undici.js
@@ -2589,6 +2589,9 @@ var require_connect = __commonJS({
       };
     };
     function onConnectTimeout(socket, opts) {
+      if (socket == null) {
+        return;
+      }
       let message = "Connect Timeout Error";
       if (Array.isArray(socket.autoSelectFamilyAttemptedAddresses)) {
         message += ` (attempted addresses: ${socket.autoSelectFamilyAttemptedAddresses.join(", ")},`;
@@ -3597,6 +3600,7 @@ var require_webidl = __commonJS({
   "lib/web/fetch/webidl.js"(exports2, module2) {
     "use strict";
     var { types, inspect } = require("node:util");
+    var { markAsUncloneable } = require("node:worker_threads");
     var { toUSVString } = require_util();
     var webidl = {};
     webidl.converters = {};
@@ -3671,6 +3675,8 @@ var require_webidl = __commonJS({
         }
       }
     };
+    webidl.util.markAsUncloneable = markAsUncloneable || (() => {
+    });
     webidl.util.ConvertToInt = function(V, bitLength, signedness, opts) {
       let upperBound;
       let lowerBound;
@@ -5031,6 +5037,7 @@ var require_formdata = __commonJS({
         __name(this, "FormData");
       }
       constructor(form) {
+        webidl.util.markAsUncloneable(this);
         if (form !== void 0) {
           throw webidl.errors.conversionFailed({
             prefix: "FormData constructor",
@@ -8808,6 +8815,7 @@ var require_headers = __commonJS({
       #guard;
       #headersList;
       constructor(init = void 0) {
+        webidl.util.markAsUncloneable(this);
         if (init === kConstruct) {
           return;
         }
@@ -9084,6 +9092,7 @@ var require_response = __commonJS({
       }
       // https://fetch.spec.whatwg.org/#dom-response
       constructor(body = null, init = {}) {
+        webidl.util.markAsUncloneable(this);
         if (body === kConstruct) {
           return;
         }
@@ -9532,6 +9541,7 @@ var require_request2 = __commonJS({
       }
       // https://fetch.spec.whatwg.org/#dom-request
       constructor(input, init = {}) {
+        webidl.util.markAsUncloneable(this);
         if (input === kConstruct) {
           return;
         }
@@ -11151,7 +11161,7 @@ var require_fetch = __commonJS({
               const decoders = [];
               const willFollow = location && request.redirect === "follow" && redirectStatusSet.has(status);
               if (codings.length !== 0 && request.method !== "HEAD" && request.method !== "CONNECT" && !nullBodyStatus.includes(status) && !willFollow) {
-                for (let i = 0; i < codings.length; ++i) {
+                for (let i = codings.length - 1; i >= 0; --i) {
                   const coding = codings[i];
                   if (coding === "x-gzip" || coding === "gzip") {
                     decoders.push(zlib.createGunzip({
@@ -11264,6 +11274,7 @@ var require_events = __commonJS({
       constructor(type, eventInitDict = {}) {
         if (type === kConstruct) {
           super(arguments[1], arguments[2]);
+          webidl.util.markAsUncloneable(this);
           return;
         }
         const prefix = "MessageEvent constructor";
@@ -11272,6 +11283,7 @@ var require_events = __commonJS({
         eventInitDict = webidl.converters.MessageEventInit(eventInitDict, prefix, "eventInitDict");
         super(type, eventInitDict);
         this.#eventInit = eventInitDict;
+        webidl.util.markAsUncloneable(this);
       }
       get data() {
         webidl.brandCheck(this, _MessageEvent);
@@ -11334,6 +11346,7 @@ var require_events = __commonJS({
         eventInitDict = webidl.converters.CloseEventInit(eventInitDict);
         super(type, eventInitDict);
         this.#eventInit = eventInitDict;
+        webidl.util.markAsUncloneable(this);
       }
       get wasClean() {
         webidl.brandCheck(this, _CloseEvent);
@@ -11357,6 +11370,7 @@ var require_events = __commonJS({
         const prefix = "ErrorEvent constructor";
         webidl.argumentLengthCheck(arguments, 1, prefix);
         super(type, eventInitDict);
+        webidl.util.markAsUncloneable(this);
         type = webidl.converters.DOMString(type, prefix, "type");
         eventInitDict = webidl.converters.ErrorEventInit(eventInitDict ?? {});
         this.#eventInit = eventInitDict;
@@ -12554,6 +12568,7 @@ var require_websocket = __commonJS({
        */
       constructor(url, protocols = []) {
         super();
+        webidl.util.markAsUncloneable(this);
         const prefix = "WebSocket constructor";
         webidl.argumentLengthCheck(arguments, 1, prefix);
         const options = webidl.converters["DOMString or sequence<DOMString> or WebSocketInit"](protocols, prefix, "options");
@@ -13204,6 +13219,7 @@ var require_eventsource = __commonJS({
        */
       constructor(url, eventSourceInitDict = {}) {
         super();
+        webidl.util.markAsUncloneable(this);
         const prefix = "EventSource constructor";
         webidl.argumentLengthCheck(arguments, 1, prefix);
         if (!experimentalWarned) {
diff --git a/src/undici_version.h b/src/undici_version.h
index e8c683acf07..7acbc1f986c 100644
--- a/src/undici_version.h
+++ b/src/undici_version.h
@@ -2,5 +2,5 @@
 // Refer to tools/dep_updaters/update-undici.sh
 #ifndef SRC_UNDICI_VERSION_H_
 #define SRC_UNDICI_VERSION_H_
-#define UNDICI_VERSION "6.20.1"
+#define UNDICI_VERSION "6.21.0"
 #endif  // SRC_UNDICI_VERSION_H_