CVE-2026-56264CWE-94

Crawl4AI - Arbitrary JavaScript Execution via /execute_js Endpoint

Critical · published June 30, 2026

CVSS v4.0
9.2
EPSS
0%
Percentile
41.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
9.2 · CRITICAL
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
EPSS
0.00488 · 41.0th percentile
Weakness
CWE-94 · Improper Control of Generation of Code ('Code Injection')
Published
2026-06-30T22:08Z
EPSS history
Timeline
  • 30 JUN 22:08Z
    Crawl4AI - Arbitrary JavaScript Execution via /execute_js Endpoint
    cvelistv5