Path Traversal in Unclecode Crawl4ai
CVE-2026-91940
crawl4ai before 0.9.3 contains an arbitrary file write vulnerability in PDFContentScrapingStrategy where the _filter_untrusted_fields function fails to validate untrusted configuration fields. Attackers can submit crafted config bodies with malicious image_save_dir paths to write attacker-controlled bytes into any directory accessible to the service account.
Vulnerability class: Path Traversal (Directory Traversal)
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-91940?
- CVE-2026-91940 is a high-severity vulnerability in Unclecode Crawl4ai, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-09-15.
- How severe is CVE-2026-91940?
- High severity. CVSS v3 base score is 7.5 out of 10.