Vulnerability · Published Jul 6, 2026 · Assigned by GitHub_M
CVE-2026-57572Crawl4AI: Unauthenticated RCE via Chromium launch-argument injection in browser_config.extra_args
Critical 10.0
In plain English
A critical-severity argument injection in crawl4ai from unclecode. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 61% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | crawl4ai | 0.9.0 | GHSA-r253-r9jw-qg44 |
| PyPI | crawl4ai | 0.9.0 | PYSEC-2026-2139 |
Affected products (as reported)
Weakness: CWE-88, CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H