CVE-2026-57572: Crawl4AI: Unauthenticated RCE via Chromium launch-argument injection in browser_config.extra_args

Severity: critical (CVSS 10.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-06 · updated 2026-10-25
Weakness: CWE-88

Description

Crawl4AI is an open-source LLM-friendly web crawler and scraper. Prior to 0.9.0, the Docker API server accepted request-supplied browser_config.extra_args, which flowed into Chromium's launch arguments. An attacker could inject Chromium switches that replace a child-process launch command together with --no-zygote, causing Chromium to fork or exec an attacker-controlled command as the container's runtime user. The Docker API is unauthenticated by default, so a single request yields arbitrary command execution. This issue is fixed in version 0.9.0.

Affected products

unclecode crawl4ai: before 0.9.0 — fixed in 0.9.0

How to fix

Upgrade to a fixed version: unclecode crawl4ai 0.9.0. Check the vendor advisory for mitigations.

References

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