CVE-2026-56264 CRITICAL

CVE-2026-56264: Crawl4AI - Arbitrary JavaScript Execution via /execute_js Endpoint

Vendor Crawl4Ai
Product Crawl4AI
Weakness CWE-94 · Code injection
Published June 30, 2026
Last update July 1, 2026
View on NVD All CVEs

CVSS base score

9.2/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 30, 2026 CVE published
July 1, 2026 Record updated