CVE-2026-56266

HighCVSS 8.6/10Last modified Oct 25, 2026

Description

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.

Metrics

CVSS 3.1 8.6/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Weakness enumeration

CWE-918

Affected software

Vendor	Product	Versions
Crawl4AI	Crawl4AI	< 0.8.7

References

https://github.com/unclecode/crawl4aiProduct
https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfgMitigation, Vendor Advisory
https://www.vulncheck.com/advisories/crawl4ai-server-side-request-forgery-via-direct-crawl-endpointsThird Party Advisory

Timeline

Published: Jun 22, 2026
Last modified: Oct 25, 2026
NVD status: Analyzed

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