Denial of Service Vulnerability in Crawl4AI by Unclecode
CVE-2026-119119

8.7HIGH

Key Information:

Vendor

Unclecode

Status
Crawl4ai
Vendor
CVE Published:
29 October 2026

What is CVE-2026-119119?

The Crawl4AI application, prior to version 0.9.5, exhibits a denial of service vulnerability in its Docker API server. The issue arises from the function _clamp_untrusted(), which does not properly limit the delay_before_return_html, mean_delay, and max_range fields of untrusted CrawlerRunConfig bodies. This flaw allows unauthenticated attackers to exploit the system by submitting excessively large values to the /crawl or /crawl/stream endpoints. As a result, they can exhaust the browser page pool and hinder the rate limiter, effectively blocking other crawling processes.

Affected Version(s)

crawl4ai 0 < 0.9.5

crawl4ai 0.9.5

References

https://github.com/unclecode/crawl4ai/security/advisories...
vendor-advisory
https://www.vulncheck.com/advisories/crawl4ai-before-0.9....
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

liuchunyi-buaa
ntohidi
.