HIGH 8.6

PYSEC-2026-596

Details

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.

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Affected packages

PyPI / crawl4ai

Introduced in: 0 Fixed in: 0.8.7

Fix pip install --upgrade 'crawl4ai>=0.8.7'

References

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