---
cve: "CVE-2026-56266"
severity: "CRITICAL"
cvss: 9.2
epss: "48%"
vendor: "Crawl4AI"
kev: false
exploited: false
published: "2026-06-22 21:04:44"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-10T08:30:29+02:00"
---

# CVE-2026-56266

> 9.2 CRITICAL · 🧪 PoC

## Beschreibung

Crawl4AI before 0.8.7 contains a server-side request forgery vulnerability in the /crawl, /crawl/stream, /md, and /llm endpoints that fetch arbitrary user-supplied URLs without validation. Unauthenticated attackers can bypass the internal-address blocklist using IPv6-mapped IPv4 addresses to reach internal services and cloud metadata endpoints.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 7b280d36b150b544bf0994285b4755dca18c2149 (Commit)

## Referenzen

- <https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfg>
- <https://github.com/unclecode/crawl4ai>
- <https://www.vulncheck.com/advisories/crawl4ai-server-side-request-forgery-via-direct-crawl-endpoints>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-56266) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_