Core Changes

• Upgrade React from 7dc903cd-20251203 to 66ae640b-20251204: #86843
• Upgrade React from 66ae640b-20251204 to 378973b3-20251205: #86852
• Turbopack: remove pages router double template: #86842
• Introduce NextConfigRuntime: #86812
• Generate required-server-files before prerendering: #86830

Misc Changes

• Turbopack: bincode: Implement bincode Encode/Decode traits on all turbo task values: #85580
• Turbopack: bincode: Add bincode encode/decode wrappers for serde_json::Value when stored in a cell: #86749
• Turbopack: bincode: Use bincode to store the contents of value cells: #86338
• [test] Fix external rewrite target URL origin: #86863
• Turbopack: correctly overwrite existing symlinks: #86808
• Turbopack: fix race condition when invalidating: #86859
• Turbopack: handle non-serializable cell content for cell update operation: #86861

Credits

Huge thanks to @bgw, @mischnic, @unstubbable, and @sokra for helping!

Core Changes

• [devtool] make the draggable content selective: #86816
• Create server module map proxy only once: #86750
• fix(next/image): add ?dpl query string for local images (without static import): #86485
• fix(next/image): handle ?dpl for src without protocol: #86836

Misc Changes

• docs: cookie clear and has alignment: #86788
• [test] fix missing nft file: #86817
• Remove unused vitest from dependency tree: #86821
• Update installed Next.js: #86822
• Remove Vercel mention from Next.js docs: #86801
• Remove unused vite from dependency tree: #86824
• Update Rspack development test manifest: #86802
• Turbopack: bincode: Add crate with bincode serialization helpers: #85878
• Turbopack: perf: Avoid clones in RopeReader: #86708
• Add Firebase App Hosting to the deployment guide: #86832
• Turbopack: bincode: Add custom bincode reader/writer implementations: #86632
• Turbopack: bincode: Add traits for types that require TurboBincodeEncoder or TurboBincodeDecoder: #86633

Credits

Huge thanks to @icyJoseph, @huozhi, @eps1lon, @gaearon, @unstubbable, @styfle, @vercel-release-bot, @bgw, and @jhuleatt for helping!

Misc Changes

• setup release branch
• Revert "feat(breaking): Hard Deprecate PPR Configuration (#84280)"
• Update React Version
• update tag
• update version script

Credits

Huge thanks to @wyattjoh for helping!

Core Changes

• [Cache Components] Fast setImmediate: #86018

Credits

Huge thanks to @lubieowoce for helping!

Core Changes

• [turbopack] move edge entry wrapper to build template: #86699
• Properly type ComponentMod: #86765
• Properly type edge handler fn: #86766
• Remove unused Server.responseCache: #86768

Misc Changes

• Turbopack: Split Dirty into Dirtyness and CleanInSession: #86070
• Turbopack: remove DirtyContainerCount from dirty_container_update: #86071
• Turbopack: fix double deployment id in web workers: #86754
• Turbopack: Split AggregatedDirtyContainer: #86606
• Turbopack: Split AggregatedDirtyContainerCount: #86072
• Turbopack: Avoid that session-dependent tasks write to DB on every build: #86068
• Turbopack: Use TransientCellData for non-serializable cells: #86069
• Fix typo in fetching data documentation: #86758
• Upgrade React from fd524fe0-20251121 to 7dc903cd-20251203: #86771
• Turbopack: use match consistently in macro: #86767

Credits

Huge thanks to @sokra, @huozhi, @mischnic, and @danpeleg4 for helping!

Please see CVE-2025-66478 for additional details about this release.

Please see CVE-2025-66478 for additional details about this release.

Please see CVE-2025-66478 for additional details about this release.

Please see CVE-2025-66478 for additional details about this release.

Please see CVE-2025-66478 for additional details about this release.