CVE-2026-91941 Crawl4AI before 0.9.3 Denial of Service via PDFContentScrapingStrategy
Attackers can cause denial of service by forcing the library to download large PDFs without limits, exhausting system resources.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-91941?
CVE-2026-91941 is a high-severity denial of service vulnerability in unclecode crawl4ai, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-400
Which versions are affected by CVE-2026-91941?
How do I fix CVE-2026-91941?
No fix has been published for CVE-2026-91941 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-91941 being exploited?
There is no known exploitation of CVE-2026-91941 in the wild and no public exploit code.
Sources
Also known as GHSA-35gf-m9jx-8qmx, GHSA-v2rm-hvrj-2x9q.