Node.js — Node.js 26.0.0 (Current)

Rafael Gonzaga2026-05-05, Version 26.0.0 (Current), @RafaelGSS We're excited to announce the release of Node.js 26! Highlights include the Temporal API enabled by default, updates to the V8 JavaScript engine to 14.6, Undici to 8.0, and several important deprecations and removals as we continue to modernize the platform. As a reminder, Node.js 26 will enter long-term support (LTS) in October, but until then, it will be the "Current" release for the next six months. We encourage you to explore the new features and benefits offered by this latest release and evaluate their potential impact on your applications. Notable Changes Temporal API The Temporal API is now enabled by default in Node.js 26. Temporal is a modern date/time API for JavaScript that provides a more robust and feature-rich alternative to the legacy Date object. Contributed by Richard Lau in #61806. V8 14.6 The V8 engine is updated to version 14.6.202.33, which is part of Chromium 146. This version also includes:

Upsert (https://github.com/tc39/proposal-upsert): [Weak]Map.prototype.getOrInsert(), [Weak]Map.prototype.getOrInsertComputed() Iterator sequencing (https://github.com/tc39/proposal-iterator-sequencing): Iterator.concat()

Contributed by Michaël Zasso in #61898. Undici 8 Undici has been updated to version 8.0.2, bringing new features and improvements to Node.js's HTTP client implementation. Deprecations and Removals

[dff46c07c3] - (SEMVER-MAJOR) crypto: move DEP0182 to End-of-Life (Tobias Nießen) #61084

[93c25815ee] - (SEMVER-MAJOR) http: move writeHeader to end-of-life (Sebastian Beltran) #60635 http.Server.prototype.writeHeader() is now fully removed.

Use http.Server.prototype.writeHead() instead.

[c755b0113c] - (SEMVER-MAJOR) stream: move _stream_* to end-of-life (Sebastian Beltran) #60657 The legacy _stream_wrap, _stream_readable, _stream_writable, _stream_duplex, _stream_transform, and _stream_passthrough modules are now fully removed.

[adac077484] - (SEMVER-MAJOR) crypto: runtime-deprecate DEP0203 and DEP0204 (Filip Skokan) #62453

[ac6375417a] - (SEMVER-MAJOR) stream: promote DEP0201 to runtime deprecation (René) #62173

[98907f560f] - (SEMVER-MAJOR) module: runtime-deprecate module.register() (Geoffrey Booth) #62401

[89f4b6cddb] - (SEMVER-MAJOR) module: remove --experimental-transform-types (Marco Ippolito) #61803

Semver-Major Commits

[d3f79aa65d] - (SEMVER-MAJOR) assert: allow printf-style messages as assertion error (Ruben Bridgewater) #58849 [f6ce381fec] - (SEMVER-MAJOR) build: bump GCC requirement to 13.2 (Michaël Zasso) #62555 [bff81fca46] - (SEMVER-MAJOR)

build: enable Temporal by default (Richard Lau) #61806 [6ddb1643e1] - (SEMVER-MAJOR) build: enable V8_VERIFY_WRITE_BARRIERS in debug build (Joyee Cheung) #61898 [a8ab08b373] - (SEMVER-MAJOR) build: reset embedder string to "-node.0" (Michaël Zasso) #61898 [0998c37eb6] - (SEMVER-MAJOR) build: target Power 9 for AIX/IBM i (Richard Lau) #62296 [d73c49e849] - (SEMVER-MAJOR) build: drop support for Python 3.9 (Mike McCready) #61177 [3c92ee1008] - (SEMVER-MAJOR) build: enable maglev for Linux on s390x (Richard Lau) #60863 [908c468828] - (SEMVER-MAJOR) build: reset embedder string to "-node.0" (Michaël Zasso) #60488 [6380fbb5ee] - (SEMVER-MAJOR) build: reset embedder string to "-node.0" (Michaël Zasso) #60111 [089d6c77e7] - (SEMVER-MAJOR) (CVE-2026-21717) build,test: test array index hash collision (Joyee Cheung) #61898 [f9bd0165c4] - (SEMVER-MAJOR) build,win: fix Temporal build (StefanStojanovic) #61806 [6cc4cf8fe8] - (SEMVER-MAJOR) crypto: unify asymmetric key import

through KeyObjectHandle::Init (Filip Skokan) #62499 [adac077484] - (SEMVER-MAJOR) crypto: runtime-deprecate DEP0203 and DEP0204 (Filip Skokan) #62453 [74509b166a] - (SEMVER-MAJOR) crypto: decorate async crypto job errors with OpenSSL error details (Filip Skokan) #62348 [da5843b91d] - (SEMVER-MAJOR) crypto: default ML-KEM and ML-DSA pkcs8 export to seed-only format (Filip Skokan) #62178 [dff46c07c3] - (SEMVER-MAJOR) crypto: move DEP0182 to End-of-Life (Tobias Nießen) #61084 [94cd600542] - (SEMVER-MAJOR) crypto: fix DOMException name for non-extractable key error (Filip Skokan) #60830 [dae2219cca] - (SEMVER-MAJOR) deps: V8: cherry-pick 0f024d4e66e0 (ishabi) #62408 [15d406c1b1] - (SEMVER-MAJOR) deps: fix V8 race condition for AIX (Abdirahim Musse) #61898 [46852d2d7a] - (SEMVER-MAJOR) deps: V8: cherry-pick cd2c216e7658 (LuYahan) #61898 [784431d6fc] - (SEMVER-MAJOR) deps: V8: backport 088b7112e7ab (Igor Sheludko) #61898 [3839c4a756] - (SEMVER-MAJOR) deps: V8: cherry-pick

00f6e834029f (Joyee Cheung) #61898 [44f64f1dd9] - (SEMVER-MAJOR) deps: V8: backport bef0d9c1bc90 (Joyee Cheung) #61898 [1f8f288e22] - (SEMVER-MAJOR) deps: V8: cherry-pick cf1bce40a5ef (Richard Lau) #61898 [d7eccac9ad] - (SEMVER-MAJOR) deps: V8: cherry-pick daf4656ba85e (Milad Fa) #61898 [3ee1ea7d0b] - (SEMVER-MAJOR) deps: V8: cherry-pick d83f479604c8 (Joyee Cheung) #61898 [80907c0239] - (SEMVER-MAJOR) deps: V8: cherry-pick edeb0a4fa181 (Joyee Cheung) #61898 [5e0dc169e9] - (SEMVER-MAJOR) deps: V8: cherry-pick aa0b288f87cc (Richard Lau) #61898 [8c1f7adbcd] - (SEMVER-MAJOR) deps: patch V8 to fix Windows build (StefanStojanovic) #61898 [3cbd3404d9] - (SEMVER-MAJOR) deps: V8: cherry-pick highway@989a498fdf3 (Richard Lau) #61898 [9f2b7d4031] - (SEMVER-MAJOR) deps: support madvise(3C) across ALL illumos revisions

(Dan McDonald) #61898 [947ec32118] - (SEMVER-MAJOR) deps: patch V8 for illumos (Dan McDonald) #61898 [0660b942b2] - (SEMVER-MAJOR) deps: remove problematic comment from v8-internal (Michaël Zasso) #61898 [bef7b31a3f] - (SEMVER-MAJOR) deps: define V8_PRESERVE_MOST as no-op on Windows (Stefan Stojanovic) #61898 [a10bf1e6ce] - (SEMVER-MAJOR) deps: patch V8 to avoid duplicated zlib symbol (Michaël Zasso) #61898 [cc547428e1] - (SEMVER-MAJOR) deps: update V8 to 14.6.202.33 (Michaël Zasso) #61898 [b81d2cbcae] - (SEMVER-MAJOR) deps: update undici to 8.0.2 (Node.js GitHub Bot) #62384 [bf5c6a8bd4] - (SEMVER-MAJOR) deps: V8: backport 151d0a44a1b2 (Abdirahim Musse) #60488 [b59af772dc] - (SEMVER-MAJOR) deps: V8: cherry-pick 47800791b35c (Jakob Kummerow) #60488 [5e41e5228a] - (SEMVER-MAJOR) deps: patch V8 for illumos

(Dan McDonald) #59805 [2243e58e43] - (SEMVER-MAJOR) deps: use std::map in MSVC STL for EphemeronRememberedSet (Joyee Cheung) #58070 [4157964c42] - (SEMVER-MAJOR) deps: remove problematic comment from v8-internal (Michaël Zasso) #58070 [7c8483a4e9] - (SEMVER-MAJOR) deps: patch V8 to avoid duplicated zlib symbol (Michaël Zasso) #54077 [53379f3706] - (SEMVER-MAJOR) deps: update V8 to 14.3.127.12 (Michaël Zasso) #60488 [f819aec288] - (SEMVER-MAJOR) deps: V8: cherry-pick ff34ae20c8e3 (Chengzhong Wu) #60111 [1acd8df36f] - (SEMVER-MAJOR) deps: V8: backport fed47445bbdd (Abdirahim Musse) #60111 [46f72577a4] - (SEMVER-MAJOR) deps: patch V8 for illumos (Dan McDonald) #59805 [39eb88eaa8] - (SEMVER-MAJOR) deps: use std::map in MSVC STL for EphemeronRememberedSet (Joyee Cheung) #58070 [ea3d14eadb] - (SEMVER-MAJOR) deps: remove problematic comment from v8-internal (Michaël Zasso) #58070 [7bc0f245b4] - (SEMVER-MAJOR) deps: patch V8 to avoid duplicated zlib symbol (Michaël Zasso) #54077

[c2843b722c] - (SEMVER-MAJOR) deps: update V8 to 14.2.231.9 (Michaël Zasso) #60111 [b4ea323833] - (SEMVER-MAJOR) diagnostics_channel: ensure tracePromise consistency with non-Promises (René) #61766 [0c08835f71] - (SEMVER-MAJOR) doc: remove extensionless CJS exception for type:module packages (Matteo Collina) #62176 [ef0f0b0865] - (SEMVER-MAJOR) doc: update supported Windows SDK version to 11 (Mike McCready) #61973 [a00d95c73d] - (SEMVER-MAJOR) doc: drop p8 and z13 support (Milad Fa) #61005 [93c25815ee] - (SEMVER-MAJOR) http: move writeHeader to end-of-life (Sebastian Beltran) #60635 [4346c0f7a7] - (SEMVER-MAJOR) http: fix handling of HTTP upgrades with bodies (Tim Perry) #60016 [fa70327610] - (SEMVER-MAJOR) lib: return undefined for localStorage without file (Matteo Collina) #61333 [b328bf74bd] - (SEMVER-MAJOR) lib,src: implement QuotaExceededError as DOMException-derived interface (Filip Skokan) #62293 [98907f560f] - (SEMVER-MAJOR) module: runtime-deprecate

module.register() (Geoffrey Booth) #62401 [89f4b6cddb] - (SEMVER-MAJOR) module: remove --experimental-transform-types (Marco Ippolito) #61803 [5334433437] - (SEMVER-MAJOR) src: replace uses of deprecated v8::External APIs (gahaas) #61898 [46e75f4874] - (SEMVER-MAJOR) src: stop using v8::PropertyCallbackInfo<T>::This() (Igor Sheludko) #61898 [54fefda0aa] - (SEMVER-MAJOR) src: avoid deprecated Wasm API (Clemens Backes) #61898 [840f509bd1] - (SEMVER-MAJOR) src: avoid deprecated FixedArray::Get (Clemens Backes) #61898 [75c3bcc3ec] - (SEMVER-MAJOR) src: update NODE_MODULE_VERSION to 147 (Michaël Zasso) #61898 [8480f87375] - (SEMVER-MAJOR) src: remove deprecated and unused isolate fields (Michaël Zasso) #60488 [70b6bd8e19] - (SEMVER-MAJOR) src: update NODE_MODULE_VERSION to 144 (Michaël Zasso) #60488 [7d2bc5249b] - (SEMVER-MAJOR) src: include node_api_types.h instead of node_api.h in node.h (Anna Henningsen) #60496 [91ab1101bc] - (SEMVER-MAJOR) src: update NODE_MODULE_VERSION to

142 (Michaël Zasso) #60111 [ac6375417a] - (SEMVER-MAJOR) stream: promote DEP0201 to runtime deprecation (René) #62173 [c755b0113c] - (SEMVER-MAJOR) stream: move _stream_* to end-of-life (Sebastian Beltran) #60657 [fadb214d95] - (SEMVER-MAJOR) stream: readable read one buffer at a time (Robert Nagy) #60441 [4fe325d93d] - (SEMVER-MAJOR) stream: preserve AsyncLocalStorage on finished only when needed (avcribl) #59873 [7682e7e9c5] - (SEMVER-MAJOR) test: skip wasm allocation tests in workers (Michaël Zasso) #61898 [ebfaf25870] - (SEMVER-MAJOR) test: update wpt Wasm jsapi expectations (Michaël Zasso) #61898 [ece6a17574] - (SEMVER-MAJOR) test: support presence of Temporal global (Michaël Zasso) #61898 [75b8d7a912] - (SEMVER-MAJOR) test: add type tags to uses of v8::External (gahaas) #61898 [092a448ad0] - (SEMVER-MAJOR) test: fix test-linux-perf-logger for V8 14.3 (Michaël Zasso) #60488 [8eb9c8f794] - (SEMVER-MAJOR) tools: remove v8_initializers_slow workaround from v8.gyp