CVSS 3.1
9.0 criticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:HCVE-2026-75604
Critical (9.0). EPSS 2.1% chance of exploitation in the next 30 days. Fixed in next 15.5.24, 16.3.3.
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.
Severity
- EPSS
- 2.1% chance of exploitation in the next 30 days; higher than 81% of CVEs (scores of 2026-10-31)
- CWE
- CWE-22
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-p293-qw3h-jr36 | npm | next | >=13.4.0 <15.5.24 | 15.5.24 |
| GHSA-p293-qw3h-jr36 | npm | next | >=16.0.0 <16.3.3 | 16.3.3 |
References
- 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
- https://github.com/vercel/next.js/security/advisories/GHSA-p293-qw3h-jr36