by Kastro
Paper/Archive/CVE-2026-56264

CVE-2026-56264

Crawl4AI Crawl4AI — Crawl4AI - Arbitrary JavaScript Execution via /execute_js Endpoint

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 42.0.420 × 208.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Crawl4AI before 0.8.7 contains an arbitrary JavaScript execution vulnerability in the Docker API server's /execute_js endpoint, which accepts and executes arbitrary user-supplied JavaScript in the server's browser context with --disable-web-security enabled. An attacker can execute arbitrary JavaScript and, combined with the browser's relaxed security settings, perform server-side request forgery against internal services.

Affected

ProductAffectedFixed inSource
Crawl4AI< 0.8.70.8.7CNA

Scores by source

VulnCheck (CNA)9.2CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
VulnCheck (CNA)8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

advisorygithub.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfgrefgithub.com/unclecode/crawl4aiwriteupvulncheck.com/advisories/crawl4ai-arbitrary-javascript-execution-via-execute-js-endpoint