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Bump next from 15.5.18 to 15.5.21 - #763

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Jul 24, 2026
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Bump next from 15.5.18 to 15.5.21#763
github-actions[bot] merged 1 commit into
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dependabot/npm_and_yarn/next-15.5.21

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@dependabot dependabot Bot commented on behalf of github Jul 24, 2026

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Bumps next from 15.5.18 to 15.5.21.

Release notes

Sourced from next's releases.

v15.5.21

This release contains security fixes for the following advisories:

High:

Moderate:

v15.5.20

Contains no changes except publishing @next/swc-wasm-web which was accidentally not published since 15.5.15.

15.5.19

[!NOTE] This release is backporting bug fixes. It does not include all pending features/changes on canary.

Core Changes

  • [15.5.x] Don't drop FormData entries (#94244)

Other

Credits

Huge thanks to @​eps1lon for helping!

Commits
  • e26f6ff v15.5.21
  • 7f5deeb [15.x] Improve performance of checking valid MPA form submissions
  • 57c31f7 [15.x] Enforce serverActions.bodySizeLimit for Server Actions in Edge runtime
  • e3e5666 [15.x] Set correct origin for internal redirects in custom server
  • 35f5013 [15.x] Ensure exotic rewrite param values are properly encoded
  • 062f667 [15.x] fix(fetch-cache): key fetch(Request, init) by the effective request
  • 577c9dc [15.x] fix(incremental-cache): byte-exact fetch cache key for binary bodies
  • 530d4fa [15.x] fix(next/image): improve performance of detectContentType()
  • 8fabaf3 [15.x] Performance improvements when decoding React Server function payloads
  • ff12a61 [15.x] Validate server reference IDs during manifest lookup
  • Additional commits viewable in compare view

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Bumps [next](https://github.com/vercel/next.js) from 15.5.18 to 15.5.21.
- [Release notes](https://github.com/vercel/next.js/releases)
- [Commits](vercel/next.js@v15.5.18...v15.5.21)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.5.21
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot Bot added dependencies Pull requests that update a dependency file javascript Pull requests that update javascript code labels Jul 24, 2026
@vercel

vercel Bot commented Jul 24, 2026

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Project Deployment Actions Updated (UTC)
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@github-actions
github-actions Bot enabled auto-merge July 24, 2026 04:48
@github-actions
github-actions Bot merged commit 438b4b9 into main Jul 24, 2026
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@dependabot
dependabot Bot deleted the dependabot/npm_and_yarn/next-15.5.21 branch July 24, 2026 04:49
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