CVE-2026-56264

Crawl4AI - Arbitrary JavaScript Execution via /execute_js Endpoint

Published Jun 30, 2026 CVSS 4.0 · 9.2 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Kidocode
Kidocode crawl4ai
CPEs cpe:2.3:a:kidocode:crawl4ai:*:*:*:*:*:*:*:*
Vendors & Products Kidocode
Kidocode crawl4ai
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Crawl4ai
Crawl4ai crawl4ai
Vendors & Products Crawl4ai
Crawl4ai crawl4ai
Type Values Removed Values Added
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.
Title Crawl4AI - Arbitrary JavaScript Execution via /execute_js Endpoint
Weaknesses CWE-94
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 8, 2026, 2:05 PM
Reserved
Jun 20, 2026, 1:42 AM
Status
Analyzed
Published
Jun 30, 2026, 11:17 PM
Modified
Jul 6, 2026, 4:08 PM