Description
Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and 16.0.0 through 16.2.10, a
rewrites() or redirects() rule that builds its external destination hostname from request-controlled input can be pointed at an arbitrary hostname, regardless of the rule's hostname suffix. For a rewrite, Next.js proxies the request to that arbitrary host and serves the response from the application's origin, leading to Server-Side Request forgery. A redirects() rule configured this way is vulnerable to an Open Redirect. This issue has been fixed in versions 15.5.21 and 16.2.11.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| vercel | next.js | >= 12.0.0 < 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 | >= 12.0.0, < 15.5.21 | 15.5.21 | GHSA-p9j2-gv94-2wf4 |
| npm | next | >= 16.0.0, < 16.2.11 | 16.2.11 | GHSA-p9j2-gv94-2wf4 |
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-p9j2-gv94-2wf4
- https://github.com/vercel/next.js/commit/35f501357e9b0fe7c950b0d6aa8fcf5343f707e9
- https://github.com/vercel/next.js/commit/d3033266c6dff23f7be71e19341fe3a8c6e2c599
- https://github.com/vercel/next.js/releases/tag/v15.5.21
- https://github.com/vercel/next.js/releases/tag/v16.2.11