High severity · published Sep 15, 2026
CVE-2026-91941
Crawl4AI before 0.9.3 Denial of Service via PDFContentScrapingStrategy
7.5
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CR
crawl4ai · unclecode
before 0.9.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-91941
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-91941
github.com
https://github.com/unclecode/crawl4ai/security/advisories/GHSA-v2rm-hvrj-2x9q
www.vulncheck.com
https://www.vulncheck.com/advisories/crawl4ai-before-0.9.3-denial-of-service-via-pdfcontentscrapingstrategy
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