Vulnerability Description
Crawl4AI is an open-source LLM-friendly web crawler and scraper. Prior to 0.9.0, when the crawler saves a downloaded file, the destination filename was taken from attacker-influenced input and joined to the downloads directory with no confinement. A filename containing an absolute path or traversal escaped the downloads directory, giving an arbitrary file write with attacker-controlled contents; the HTTP crawler path uses the response Content-Disposition filename and the browser crawler path uses the download's suggested filename. Because the written bytes are attacker-controlled, this can escalate to remote code execution. This issue is fixed in version 0.9.0.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Kidocode | Crawl4Ai | < 0.9.0 |
Related Weaknesses (CWE)
References
- https://github.com/unclecode/crawl4ai/commit/60886d1a0c52682e4c83a7cef9dfac417ffPatch
- https://github.com/unclecode/crawl4ai/security/advisories/GHSA-2jq4-q6vv-4cp3MitigationVendor AdvisoryExploit
FAQ
What is CVE-2026-57571?
CVE-2026-57571 is a vulnerability with a CVSS score of 9.6 (CRITICAL). Crawl4AI is an open-source LLM-friendly web crawler and scraper. Prior to 0.9.0, when the crawler saves a downloaded file, the destination filename was taken from attacker-influenced input and joined ...
How severe is CVE-2026-57571?
CVE-2026-57571 has been rated CRITICAL with a CVSS base score of 9.6/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-57571?
Check the references section above for vendor advisories and patch information. Affected products include: Kidocode Crawl4Ai.