CVE-2026-75604
Next.js: Unauthenticated Remote Code Execution on windows-hosted servers
- State
- Published
- Severity
- 9.0 Critical
- Published
- Sep 1, 2026
- Updated
- Sep 4, 2026
- Reserved
- Aug 17, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.0 Critical | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H | GitHub_M |
Weaknesses
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products
| Product | Versions |
|---|---|
next.jsvercel |
|
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
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