What is CVE-2026-91941?

CVE-2026-91941 is a high-severity vulnerability in Unclecode Crawl4ai, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-09-15.

How severe is CVE-2026-91941?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Unclecode Crawl4ai

CVE-2026-91941

Crawl4AI before 0.9.3 contains an uncontrolled resource consumption vulnerability in PDFContentScrapingStrategy that allows untrusted clients to cause denial of service. Attackers can select the PDF scraping strategy in POST requests to download large remote PDFs without size or page limits, exhausting disk, CPU, and bandwidth on shared workers.

Vulnerability class: DoS (Denial of Service)

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:N/A:H.

Affected products

Unclecode Crawl4ai

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-91941?: CVE-2026-91941 is a high-severity vulnerability in Unclecode Crawl4ai, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-09-15.
How severe is CVE-2026-91941?: High severity. CVSS v3 base score is 7.5 out of 10.