Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Kidocode | Crawl4Ai | < 0.8.7 |
Related Weaknesses (CWE)
References
- https://github.com/unclecode/crawl4aiProduct
- https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfgMitigationVendor Advisory
- https://www.vulncheck.com/advisories/crawl4ai-server-side-request-forgery-via-diThird Party Advisory
FAQ
What is CVE-2026-56266?
CVE-2026-56266 is a vulnerability with a CVSS score of 8.6 (HIGH). 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. Unauthentic...
How severe is CVE-2026-56266?
CVE-2026-56266 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-56266?
Check the references section above for vendor advisories and patch information. Affected products include: Kidocode Crawl4Ai.