chore(deps): bump next from 12.3.5 to 15.5.21 in /examples/next-js-builder-site

[dependabot]

Bumps next from 12.3.5 to 15.5.21.

Release notes

Sourced from next's releases.

v15.5.21

This release contains security fixes for the following advisories:

High:

• Denial of Service in App Router using Server Actions
• Middleware / Proxy bypass in App Router applications using Turbopack and single locale
• Server-Side Request Forgery in rewrites via attacker-controlled destination hostname
• Server-Side Request Forgery in Server Actions on custom servers

Moderate:

• Cache confusion of response bodies for requests with bodies
• Cache confusion of response bodies for requests with bodies containing invalid UTF-8 byte sequences
• Denial of Service in the Image Optimization API using SVGs
• Unauthenticated disclosure of internal Server Function endpoints
• Unbounded Server Action payload in Edge runtime

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

• [15.5.x] Fix CI (#94281)

Credits

Huge thanks to @​eps1lon for helping!

v15.5.18

This release contains security fixes for the following advisories:

High:

• GHSA-8h8q-6873-q5fj: Denial of Service with Server Components
• GHSA-267c-6grr-h53f: Middleware / Proxy bypass in App Router applications via segment-prefetch routes
• GHSA-26hh-7cqf-hhc6: Middleware / Proxy bypass in App Router applications via segment-prefetch routes - Incomplete Fix Follow-Up
• GHSA-mg66-mrh9-m8jx: Denial of Service via connection exhaustion in applications using Cache Components
• GHSA-492v-c6pp-mqqv: Middleware / Proxy bypass through dynamic route parameter injection
• GHSA-c4j6-fc7j-m34r: Server-side request forgery in applications using WebSocket upgrades
• GHSA-36qx-fr4f-26g5: Middleware / Proxy bypass in Pages Router applications using i18n

... (truncated)

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

Maintainer changes

This version was pushed to npm by GitHub Actions, a new releaser for next since your current version.

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Note

Medium Risk
Major Next.js upgrade without accompanying config or React/plugin changes may break the example build; scope is limited to a non-production sample app.

Overview
Dependabot bumps next from 12.3.5 to 15.5.21 in examples/next-js-builder-site (with the matching lockfile refresh). No app source or next.config.js changes are included—only the framework dependency version.

The jump spans three major releases, so this is more than a security patch: the example still targets React 17, uses next-plugin-preact, and a Pages Router–era setup (next/babel, custom webpack in next.config.js). Reviewers should confirm npm run build / dev still work and whether Next 15 expects config or peer dependency updates beyond the version pin.

The upgrade aligns with 15.5.21 security advisories (Server Actions, middleware bypass, SSRF, image/cache issues, etc.) called out in the PR description.

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☁️ Nx Cloud last updated this comment at 2026-07-28 01:09:12 UTC