Description
Next.js is a React framework for building full-stack web applications. In versions 15.5.0 through 15.5.20 and 16.0.0 through 16.2.10, when self-hosting Next.js with the default image loader, the Image Optimization API can optimize remotely hosted images if configured (not enabled by default). If those images contain malicious content, they can cause CPU exhaustion in /_next/image endpoints.Only config.images.remotePatterns is affected, and just the patterns in that array, whereas config.images.unoptimized: true, config.images.loader: 'custom', and Vercel are not impacted. This issue has been fixed in versions 15.5.21 and 16.2.11.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| vercel | next.js | >= 15.5.0, < 15.5.21, >= 16.0.0, < 16.2.11 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | jitsucom-jitsu-console | 2.11.0-r30 | — |
| Wolfi rolling | langfuse-3 +1 | 3.224.1-r0 | — |
| Wolfi rolling | langfuse-3-compat | 3.225.7-r6 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | next | >= 15.5.0, < 15.5.21 | 15.5.21 | GHSA-q8wf-6r8g-63ch |
| npm | next | >= 16.0.0, < 16.2.11 | 16.2.11 | GHSA-q8wf-6r8g-63ch |
Advisories 1
- WID-SEC-2026-2468 Vercel Next.js: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 4, 2026
References
- https://github.com/vercel/next.js/security/advisories/GHSA-q8wf-6r8g-63ch
- https://github.com/vercel/next.js/pull/96006
- https://github.com/vercel/next.js/commit/93cb90891402fa4c47798d03cb9e05c13233766c
- https://github.com/vercel/next.js/releases/tag/v15.5.21
- https://github.com/vercel/next.js/releases/tag/v16.2.11