{"id":"CVE-2026-64645","aliases":["GHSA-p9j2-gv94-2wf4"],"url":"https://o3.security/vulnerability/CVE-2026-64645","summary":"Next.js: Server-Side Request Forgery in rewrites via attacker-controlled destination hostname","details":"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\n 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.","published":"2026-07-27T17:37:07.695Z","modified":"2026-08-12T03:51:20.587119864Z","cvss":null,"epss":{"score":0.00925,"percentile":0.58367,"asOf":"2026-09-10"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"next","fixedVersion":"15.5.21"},{"ecosystem":"npm","name":"next","fixedVersion":"16.2.11"}],"fix":{"url":"https://github.com/vercel/next.js/commit/35f501357e9b0fe7c950b0d6aa8fcf5343f707e9","label":"vercel/next.js@35f5013"},"references":[{"type":"WEB","url":"https://github.com/vercel/next.js/releases/tag/v15.5.21"},{"type":"WEB","url":"https://github.com/vercel/next.js/releases/tag/v16.2.11"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64645.json"},{"type":"ADVISORY","url":"https://github.com/vercel/next.js/security/advisories/GHSA-p9j2-gv94-2wf4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64645"},{"type":"FIX","url":"https://github.com/vercel/next.js/commit/35f501357e9b0fe7c950b0d6aa8fcf5343f707e9"},{"type":"FIX","url":"https://github.com/vercel/next.js/commit/d3033266c6dff23f7be71e19341fe3a8c6e2c599"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:20.587119864Z"}}