# CVE-2026-75604: Next.js: Unauthenticated Remote Code Execution on windows-hosted servers

> CVE-2026-75604: Next.js: Unauthenticated Remote Code Execution on windows-hosted servers. CVSS 9.0 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-75604
Last updated: 2026-09-09T21:09:13Z

- Published: 2026-09-01 21:23 UTC · Updated: 2026-09-09 21:09 UTC · Assigner: GitHub\_M
- CVSS: 9.0 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
- EPSS: 2.1%, 82th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-22

## 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.

## Affected vendors and products

- vercel: next.js

## Tracked companies

- [Vercel](https://rewindex.com/company/vercel.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-75604)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-75604)
- [https://github.com/vercel/next.js/commit/968b9fcb26bdeb8e0a861a9df05361474666d51b](https://github.com/vercel/next.js/commit/968b9fcb26bdeb8e0a861a9df05361474666d51b)
- [https://github.com/vercel/next.js/commit/b0f3460a92b955d3ca41fccff9a525a2b910fbf3](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/v15.5.24)
- [https://github.com/vercel/next.js/releases/tag/v16.3.3](https://github.com/vercel/next.js/releases/tag/v16.3.3)
- [https://github.com/vercel/next.js/security/advisories/GHSA-p293-qw3h-jr36](https://github.com/vercel/next.js/security/advisories/GHSA-p293-qw3h-jr36)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-75604 · Markdown: https://rewindex.com/cve/CVE-2026-75604.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-75604 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:09:00.509Z