PT-2026-56002 · Unclecode · Crawl4Ai

Unclecode · Published 2026-07-06 · Updated 2026-07-06 · CVE-2026-57571

NVD

CVSS v3.1

9.6

Critical

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

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.

Fix

Link Following

Path traversal

Weakness Enumeration

CWE-59

CWE-22

Related Identifiers

CVE-2026-57571

Affected Products

Crawl4Ai

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-57571 · Security Note
• https://github.com/unclecode/crawl4ai/commit/60886d1a0c52682e4c83a7cef9dfac417fff6bd2 · Note
• https://github.com/unclecode/crawl4ai/security/advisories/GHSA-2jq4-q6vv-4cp3 · Note