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.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/vercel/next.js/commit/35f501357e9b0fe7c950b0d6aa8fcf5343f707e9 Patch
- https://github.com/vercel/next.js/commit/d3033266c6dff23f7be71e19341fe3a8c6e2c599 Patch
- https://github.com/vercel/next.js/security/advisories/GHSA-p9j2-gv94-2wf4 Mitigation, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.3 · vercelNVD modified 2026-10-24 13:10
Affected (CPE criteria) 1
cpe:2.3:a:vercel:next.js:*:*:*:*:*:node.js:*:*
References 5
- https://github.com/vercel/next.js/commit/35f501357e9b0fe7c950b0d6aa8fcf5343f707e9 Patch
- https://github.com/vercel/next.js/commit/d3033266c6dff23f7be71e19341fe3a8c6e2c599 Patch
- https://github.com/vercel/next.js/releases/tag/v15.5.21 Product, Release Notes
- https://github.com/vercel/next.js/releases/tag/v16.2.11 Product, Release Notes
- https://github.com/vercel/next.js/security/advisories/GHSA-p9j2-gv94-2wf4 Mitigation, Vendor Advisory