Crawl4AI Critical RCE Sandbox Escape Guide 2026: CVE-2026-53753 (CVSS 9.8)
On June 16, 2026, the Crawl4AI project released version 0.8.7 with a fix for CVE-2026-53753 — a pre-authentication remote code execution vulnerability with a CVSS score of 9.8. The exploit requires a single HTTP POST request to the /crawl endpoint, no authentication, and it works against the default Docker image. If you run Crawl4AI in any production or development capacity, this is the most important security update of 2026 for your AI pipeline. ...