# CVE-2026-64645: Next.js: Server-Side Request Forgery in rewrites via attacker-controlled destination hostname

> CVE-2026-64645: Next.js: Server-Side Request Forgery in rewrites via attacker-controlled destination hostname. CVSS 6.1 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-64645
Last updated: 2026-10-24T13:10:00Z

- Published: 2026-07-27 17:37 UTC · Updated: 2026-10-24 13:10 UTC · Assigner: GitHub\_M
- CVSS: 6.1 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS: 0.41%, 35th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-601, CWE-918

## Description

Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and 16.0.0 through 16.2.10, a  rewrites() or redirects() rule that builds its external destination hostname from request-controlled input can be pointed at an arbitrary hostname, regardless of the rule's hostname suffix. For a rewrite, Next.js proxies the request to that arbitrary host and serves the response from the application's origin, leading to Server-Side Request forgery. A redirects() rule configured this way is vulnerable to an Open Redirect. This issue has been fixed in versions 15.5.21 and 16.2.11.

## 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-2026-64645)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-64645)
- [https://github.com/vercel/next.js/commit/35f501357e9b0fe7c950b0d6aa8fcf5343f707e9](https://github.com/vercel/next.js/commit/35f501357e9b0fe7c950b0d6aa8fcf5343f707e9)
- [https://github.com/vercel/next.js/commit/d3033266c6dff23f7be71e19341fe3a8c6e2c599](https://github.com/vercel/next.js/commit/d3033266c6dff23f7be71e19341fe3a8c6e2c599)
- [https://github.com/vercel/next.js/releases/tag/v15.5.21](https://github.com/vercel/next.js/releases/tag/v15.5.21)
- [https://github.com/vercel/next.js/releases/tag/v16.2.11](https://github.com/vercel/next.js/releases/tag/v16.2.11)
- [https://github.com/vercel/next.js/security/advisories/GHSA-p9j2-gv94-2wf4](https://github.com/vercel/next.js/security/advisories/GHSA-p9j2-gv94-2wf4)

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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-2026-64645 · Markdown: https://rewindex.com/cve/CVE-2026-64645.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-64645 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:13:17.278Z