CVE-2026-56264 Crawl4AI - Arbitrary JavaScript Execution via /execute_js Endpoint
Attackers can execute arbitrary JavaScript in the server's browser context via the /execute_js endpoint, potentially leading to SSRF and code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-56264?
CVE-2026-56264 is a critical code injection vulnerability in Crawl4AI, published on 30 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-94
Which versions are affected by CVE-2026-56264?
It affects 1 product.
Products include Kidocode Crawl4ai.
How do I fix CVE-2026-56264?
Upgrade to a fixed version.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-56264 being exploited?
There is no known exploitation of CVE-2026-56264 in the wild and no public exploit code.
Other vulnerabilities in Crawl4AI
- CVE-2026-57572 Crawl4AI: Unauthenticated RCE via Chromium launch-argument injection in browser_config.extra_args
- CVE-2026-26216 Crawl4AI < 0.8.0 Docker API Unauthenticated Remote Code Execution via Hooks Parameter
- CVE-2026-53753 Crawl4AI: AST Sandbox Escape via gi_frame.f_back Chain - Pre-Auth RCE in Docker API
- CVE-2026-57571 Crawl4AI arbitrary file write via download filename path traversal
- CVE-2026-56265 Crawl4AI - Authentication Bypass via Hardcoded JWT Signing Key