PYPI · JUNE 2026 · EARLY WARNING

Multiple Vulnerabilities Reported in Crawl4AI Docker API Server

EARLY WARNING · UNCONFIRMED. This page describes a developing threat that 0Day surfaced from early signals and has not yet independently confirmed. Details may change. Always verify against the primary sources before acting.

GHSA-365W-HQF6-VXFGSeverity: CRITICAL

An early warning has been issued regarding multiple security vulnerabilities in the Crawl4AI Docker API server, which may affect various endpoints. Users of Crawl4AI are advised to review their exposure.

What happened

Multiple security vulnerabilities have been reported in the Crawl4AI Docker API server, impacting endpoints for crawling, markdown/LLM extraction, screenshots, PDFs, webhooks, monitoring, JavaScript execution, and configuration. The vulnerabilities include arbitrary file write, SSRF, authentication bypass, stored XSS, and arbitrary JavaScript execution. These vulnerabilities appear to affect a wide range of versions from the initial release up to 0.8.9, with fixes introduced in version 0.9.0. It is recommended that users upgrade to the latest version of crawl4ai and review the provided fixes for each vulnerability. For detailed version information and fixes, primary sources should be consulted.

How 0Day mitigates this

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