---
cve: "CVE-2026-64645"
severity: "HIGH"
cvss: 8.3
epss: "78%"
vendor: "vercel"
kev: false
exploited: false
published: "2026-07-27 18:16:59"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T02:59:52+02:00"
---

# CVE-2026-64645

> 8.3 HIGH · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- e26f6ffaa710fc62ca0c8640db0e43b6663edf32 (Commit)
- 9beca0821cf4606ae33466ed6f4fc75f2887a4da (Commit)

## Referenzen

- <https://github.com/vercel/next.js/security/advisories/GHSA-p9j2-gv94-2wf4>
- <https://github.com/vercel/next.js/commit/35f501357e9b0fe7c950b0d6aa8fcf5343f707e9>
- <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/v16.2.11>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-64645) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_