CVE-2026-75604
criticalNext.js is a React framework for building full-stack web applications.
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/vercel/next.js/commit/968b9fcb26bdeb8e0a861a9df05361474666d51b security-advisories@github.com
- https://github.com/vercel/next.js/commit/b0f3460a92b955d3ca41fccff9a525a2b910fbf3 security-advisories@github.com
- https://github.com/vercel/next.js/releases/tag/v15.5.24 security-advisories@github.com
- https://github.com/vercel/next.js/releases/tag/v16.3.3 security-advisories@github.com
- https://github.com/vercel/next.js/security/advisories/GHSA-p293-qw3h-jr36 security-advisories@github.com