{"id":"CVE-2026-75604","state":"PUBLISHED","title":"Next.js: Unauthenticated Remote Code Execution on windows-hosted servers","description":"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.","publishedAt":"2026-09-01T21:23:30.859Z","updatedAt":"2026-09-04T19:54:40.089Z","severity":{"score":9,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["vercel next.js"],"affected":[{"vendor":"vercel","product":"next.js","versions":[{"version":">= 13.4.0, < 15.5.24","status":"affected"},{"version":">= 16.0.0, < 16.3.3","status":"affected"}]}],"references":["https://github.com/vercel/next.js/security/advisories/GHSA-p293-qw3h-jr36","https://github.com/vercel/next.js/commit/968b9fcb26bdeb8e0a861a9df05361474666d51b","https://github.com/vercel/next.js/commit/b0f3460a92b955d3ca41fccff9a525a2b910fbf3","https://github.com/vercel/next.js/releases/tag/v15.5.24","https://github.com/vercel/next.js/releases/tag/v16.3.3"],"weaknesses":["CWE-22"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/75xxx/CVE-2026-75604.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-75604","state":"PUBLISHED","datePublished":"2026-09-01T21:23:30.859Z","dateUpdated":"2026-09-04T19:54:40.089Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-17T23:49:03.450Z"},"containers":{"cna":{"title":"Next.js: Unauthenticated Remote Code Execution on windows-hosted servers","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"vercel","product":"next.js","versions":[{"version":">= 13.4.0, < 15.5.24","status":"affected"},{"version":">= 16.0.0, < 16.3.3","status":"affected"}]}],"references":[{"url":"https://github.com/vercel/next.js/security/advisories/GHSA-p293-qw3h-jr36","name":"https://github.com/vercel/next.js/security/advisories/GHSA-p293-qw3h-jr36","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/vercel/next.js/commit/968b9fcb26bdeb8e0a861a9df05361474666d51b","name":"https://github.com/vercel/next.js/commit/968b9fcb26bdeb8e0a861a9df05361474666d51b","tags":["x_refsource_MISC"]},{"url":"https://github.com/vercel/next.js/commit/b0f3460a92b955d3ca41fccff9a525a2b910fbf3","name":"https://github.com/vercel/next.js/commit/b0f3460a92b955d3ca41fccff9a525a2b910fbf3","tags":["x_refsource_MISC"]},{"url":"https://github.com/vercel/next.js/releases/tag/v15.5.24","name":"https://github.com/vercel/next.js/releases/tag/v15.5.24","tags":["x_refsource_MISC"]},{"url":"https://github.com/vercel/next.js/releases/tag/v16.3.3","name":"https://github.com/vercel/next.js/releases/tag/v16.3.3","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-01T21:23:30.859Z"},"source":{"advisory":"GHSA-p293-qw3h-jr36","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-03T03:56:24.826443Z","id":"CVE-2026-75604","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-04T19:54:40.089Z"}}]}}}