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.

Metrics

Attack Vector Network

Attack Complexity High

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact total

Affected Vendors & Products

Vendors Products
Crawl4ai
  • Crawl4ai

No data.

No data.

References
Link Providers
https://github.com/unclecode/crawl4ai cve-icon
https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfg cve-icon
https://www.vulncheck.com/advisories/crawl4ai-arbitrary-javascript-execution-via-execute-js-endpoint cve-icon
History

Wed, 01 Jul 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

Wed, 01 Jul 2026 04:00:00 +0000

Type Values Removed Values Added
First Time appeared Crawl4ai
Crawl4ai crawl4ai
Vendors & Products Crawl4ai
Crawl4ai crawl4ai

Tue, 30 Jun 2026 22:45:00 +0000

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'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-06-30T22:08:26.600Z

Updated: 2026-07-01T14:59:24.723Z

Reserved: 2026-06-20T01:42:20.615Z

Link: CVE-2026-56264

cve-icon Vulnrichment

Updated: 2026-07-01T14:59:19.916Z

cve-icon NVD

No data.

cve-icon Redhat

No data.