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.
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Affected Vendors & Products
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Sat, 05 Sep 2026 08:30:00 +0000
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ssvc
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Tue, 01 Sep 2026 23:45:00 +0000
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Vercel
Vercel next.js |
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Vercel
Vercel next.js |
Tue, 01 Sep 2026 22:00:00 +0000
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| 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. | |
| Title | Next.js: Unauthenticated Remote Code Execution on windows-hosted servers | |
| Weaknesses | CWE-22 | |
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cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-09-01T21:23:30.859Z
Updated: 2026-09-04T19:54:40.089Z
Reserved: 2026-08-17T23:49:03.450Z
Link: CVE-2026-75604
Updated: 2026-09-02T12:04:23.041Z
Status : Deferred
Published: 2026-09-01T22:17:12.697
Modified: 2026-09-09T21:09:13.080
Link: CVE-2026-75604
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