{"id":"CVE-2026-56266","summary":"Crawl4AI - Server-Side Request Forgery via Direct Crawl Endpoints","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-2026-56261","CVE-2026-56262","CVE-2026-56263","CVE-2026-56264","CVE-2026-56265","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-2026-596","PYSEC-2026-798"],"modified":"2026-07-11T04:11:25.369616976Z","published":"2026-06-22T21:04:44.755Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-918"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56266.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56266.json"},{"type":"ADVISORY","url":"https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56266"},{"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":[{"ranges":[{"type":"GIT","repo":"https://github.com/unclecode/crawl4ai","events":[{"introduced":"0"},{"fixed":"7b280d36b150b544bf0994285b4755dca18c2149"}],"database_specific":{"source":["AFFECTED_FIELD","CPE_RANGE"],"extracted_events":[{"introduced":"0"},{"fixed":"0.8.7"}],"cpe":"cpe:2.3:a:kidocode:crawl4ai:*:*:*:*:*:*:*:*"}}],"versions":["docker-rebuild-v0.8.6","v0.8.6","v0.7.4","v0.7.3","v0.7.2","v0.7.1","v0.7.0","vr0.6.3","v0.6.3","vr0.6.0","vr0.6.0rc1","v0.5.0.post1","v0.4.243","v0.4.24","v0.3.745","v.3.72","v0.3.6","0.3.4","v0.3.3","v0.3.0","v0.2.77","v0.0.75","v0.2.74","v0.2.73","v0.2.72","v0.2.71","v0.2.7","v0.2.6","v0.2.4","v0.2.1","v0.2.0","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56266.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"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"}]}