{"id":"CVE-2026-75604","aliases":["GHSA-p293-qw3h-jr36"],"url":"https://o3.security/vulnerability/CVE-2026-75604","summary":"Next.js: Unauthenticated Remote Code Execution on windows-hosted servers","details":"Next.js is a React framework for building full-stack web applications. From 13.4.0 until 15.5.24 and 16.3.3, Next.js applications using Pages Router or App Router without Cache Components on Windows-hosted servers do not consistently escape backslashes in route segments before constructing incremental-cache paths. In packages/next/src/shared/lib/router/utils/escape-path-delimiters.ts and packages/next/src/server/lib/incremental-cache/file-system-cache.ts, a remote request can supply encoded Windows path separators that traverse outside the intended cache root and expose private build data, including the server-reference-manifest encryption key. Disclosure of that key can enable remote code execution in the affected application. This issue is fixed in versions 15.5.24 and 16.3.3.","published":"2026-09-01T21:23:30.859Z","modified":"2026-09-11T03:30:52.422534066Z","cvss":{"score":9,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H"},"epss":{"score":0.02462,"percentile":0.83581,"asOf":"2026-09-15"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"npm","name":"next","fixedVersion":"15.5.24"},{"ecosystem":"npm","name":"next","fixedVersion":"16.3.3"}],"fix":{"url":"https://github.com/vercel/next.js/commit/968b9fcb26bdeb8e0a861a9df05361474666d51b","label":"vercel/next.js@968b9fc"},"references":[{"type":"WEB","url":"https://github.com/vercel/next.js/releases/tag/v15.5.24"},{"type":"WEB","url":"https://github.com/vercel/next.js/releases/tag/v16.3.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75604.json"},{"type":"ADVISORY","url":"https://github.com/vercel/next.js/security/advisories/GHSA-p293-qw3h-jr36"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-75604"},{"type":"FIX","url":"https://github.com/vercel/next.js/commit/968b9fcb26bdeb8e0a861a9df05361474666d51b"},{"type":"FIX","url":"https://github.com/vercel/next.js/commit/b0f3460a92b955d3ca41fccff9a525a2b910fbf3"},{"type":"PACKAGE","url":"https://github.com/vercel/next.js"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-11T03:30:52.422534066Z"}}