{"id":"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.","aliases":["CVE-2026-56262","CVE-2026-56263","CVE-2026-56264","CVE-2026-56265","CVE-2026-56266","GHSA-365w-hqf6-vxfg","GHSA-53rg-46cm-4g2v","GHSA-8qrg-7j2f-rf2h","GHSA-g2pv-76hm-j4x9","GHSA-xrfj-6m49-wfmm","PYSEC-2026-229","PYSEC-2026-230","PYSEC-2026-239","PYSEC-2026-798"],"modified":"2026-07-09T16:56:25.969346541Z","published":"2026-06-22T22:16:50.937Z","references":[{"type":"ADVISORY","url":"https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfg"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/crawl4ai-server-side-request-forgery-via-direct-crawl-endpoints"},{"type":"PACKAGE","url":"https://github.com/unclecode/crawl4ai"}],"affected":[{"package":{"name":"crawl4ai","ecosystem":"PyPI","purl":"pkg:pypi/crawl4ai"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.7"}]}],"versions":["0.3.0","0.3.1","0.3.2","0.3.3","0.3.4","0.3.5","0.3.6","0.3.7","0.3.71","0.3.72","0.3.73","0.3.731","0.3.74","0.3.741","0.3.742","0.3.743","0.3.744","0.3.745","0.3.746","0.3.8","0.4.0","0.4.1","0.4.21","0.4.22","0.4.23","0.4.24","0.4.241","0.4.242","0.4.243","0.4.244","0.4.245","0.4.246","0.4.247","0.4.248","0.4.248b3","0.4.3b1","0.4.3b2","0.4.3b3","0.5.0","0.5.0.post1","0.5.0.post2","0.5.0.post3","0.5.0.post4","0.5.0.post5","0.5.0.post6","0.5.0.post7","0.5.0.post8","0.6.0","0.6.0rc1","0.6.1","0.6.2","0.6.3","0.7.0","0.7.1","0.7.2","0.7.3","0.7.4","0.7.5","0.7.6","0.7.7","0.7.8","0.8.0","0.8.5","0.8.6"],"ecosystem_specific":{},"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/crawl4ai/PYSEC-2026-596.yaml"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N"}]}