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fix(deps): upgrade Next.js to 16.4.1 (October 14 security release) - #304

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fix/nextjs-16.4.1-security
Oct 14, 2026
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fix/nextjs-16.4.1-security

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Summary

Upgrades next from 16.2.10 to 16.4.1 in the docs site (catalog) and the seven Next.js examples. 16.4.1 is the patched Active LTS release from the October 14 Next.js security update. No 16.2.x patch exists, so this also crosses 16.3 and 16.4.

Advisory Severity
GHSA-673q-mjm6-r5xr: unauthenticated RCE in use cache functions returning typed arrays Critical
CVE-2026-96889 / GHSA-2464-fhr4-w9xw: Image Optimization RCE with SVG via sharp/librsvg on glibc Linux Critical
GHSA-p3m5-59mp-jv5r: Server Actions CPU DoS High

Next's sharp now resolves to the fixed 0.35.5. 16.2.10 had pulled 0.34.5.

Release-age exclusion (temporary)

16.4.1 was published on 2026-10-14 at 17:43 UTC, so pnpm's one-day minimumReleaseAge blocks it until 2026-10-15 at about 17:45 UTC. pnpm-workspace.yaml adds a minimumReleaseAgeExclude covering only the exact next@16.4.1 and @next/*@16.4.1 versions, with a comment to remove it after that. Patterns are not exempted.

Not covered here

  • evals/agents/fixtures/next stays on 16.2.10. It's an eval fixture with its own lockfile and release-age gate, and it isn't deployed.
  • The Astro example (and @edgestore/server's astro dev dep) still resolves sharp@0.35.3 through astro's peer range. That is outside this Next.js advisory.

Verification

  • CI steps pass locally: check:dependencies, format --check, lint, typecheck, build, test
  • next build passes on 16.4.1 for docs and every Next example (basic-access-control needs dummy EDGESTORE_* keys, as before)
  • next start on the docs build: /, /docs/quick-start, /pricing and /blog return 200, and the server log has no errors

🤖 Generated with Claude Code

Patches GHSA-673q-mjm6-r5xr (use cache RCE), CVE-2026-96889 /
GHSA-2464-fhr4-w9xw (Image Optimization SVG RCE via sharp) and
GHSA-p3m5-59mp-jv5r (Server Actions DoS) in the docs site and the
Next.js examples. Next now resolves the fixed sharp 0.35.5.

16.4.1 is younger than the one-day minimumReleaseAge, so its exact
versions are excluded until then.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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