unclecode Crawl4AI up to 0.8.x File path traversal

Summaryinfo

A vulnerability labeled as critical has been found in unclecode Crawl4AI up to 0.8.x. The impacted element is an unknown function of the component File Handler. Such manipulation leads to path traversal. This vulnerability is documented as CVE-2026-57571. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in unclecode Crawl4AI up to 0.8.x. Affected by this issue is an unknown part of the component File Handler. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-57571 since 06/24/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

Upgrading to version 0.9.0 eliminates this vulnerability.

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Productinfo

Vendor

• unclecode

Name

• Crawl4AI

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8

Website

• Product: https://github.com/unclecode/crawl4ai/

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