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Description

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.

PUBLISHED Reserved 2026-06-20 | Published 2026-06-30 | Updated 2026-07-14 | Assigner VulnCheck




CRITICAL: 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
HIGH: 8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

Improper Control of Generation of Code ('Code Injection')

Product status

Default status
unaffected

Any version before 0.8.7
affected

0.8.7 (semver)
unaffected

References

github.com/...awl4ai/security/advisories/GHSA-365w-hqf6-vxfg vendor-advisory

github.com/unclecode/crawl4ai product

www.vulncheck.com/...cript-execution-via-execute-js-endpoint (VulnCheck Advisory: Crawl4AI - Arbitrary JavaScript Execution via /execute_js Endpoint) third-party-advisory

cve.org (CVE-2026-56264)

nvd.nist.gov (CVE-2026-56264)

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