---
cve: "CVE-2026-44572"
severity: "LOW"
cvss: 3.7
epss: "28%"
vendor: "vercel"
kev: false
exploited: false
published: "2026-05-13 16:16:58"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-14T11:11:37+02:00"
---

# CVE-2026-44572

> 3.7 LOW · 🧪 PoC

## Beschreibung

Next.js is a React framework for building full-stack web applications. From 12.2.0 to before 15.5.16 and 16.2.5, an external client could send a x-nextjs-data header on a normal request to a path handled by middleware that returns a redirect. When that happened, the middleware/proxy could treat the request as a data request and replace the standard Location redirect header with the internal x-nextjs-redirect header. Browsers do not follow x-nextjs-redirect, so the response became an unusable redirect for normal clients. If the application was deployed behind a CDN or reverse proxy that caches 3xx responses without varying on this header, a single attacker request could poison the cached redirect response for the affected path. Subsequent visitors could then receive a cached redirect response without a Location header, causing a denial of service for that redirect path until the cache entry expired or was purged. This vulnerability is fixed in 15.5.16 and 16.2.5.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Gering | warn |

## Patch verfügbar (OSV)

- ad6fd4e50e5aba20b60d283c42b89273a3167ccd (Commit)
- 766148f9cd48c0e218acafcd0f15defc14871bf4 (Commit)

## Referenzen

- <https://github.com/vercel/next.js/security/advisories/GHSA-3g8h-86w9-wvmq>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-44572) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_