by Kastro
Paper/Archive/CVE-2026-56266

CVE-2026-56266

Crawl4AI Crawl4AI — Crawl4AI - Server-Side Request Forgery via Direct Crawl Endpoints

EPSS 0.5%CVSS 9.2
critical.is priorityof 100
36
CVSS 9.2 (CNA)9.2 / 10 × 3027.6Not in CISA KEV+300.0EPSS percentile 41.2.412 × 208.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Crawl4AI< 0.8.70.8.7CNA

Scores by source

VulnCheck (CNA)9.2CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
VulnCheck (CNA)8.6CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorygithub.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfgrefgithub.com/unclecode/crawl4aiwriteupvulncheck.com/advisories/crawl4ai-server-side-request-forgery-via-direct-crawl-endpoints