CVE-2026-119119
Crawl4AI before 0.9.5 Denial of Service via Unbounded CrawlerRunConfig Delay Fields
Crawl4AI before 0.9.5 contains a denial of service vulnerability in the Docker API server where _clamp_untrusted() fails to cap the delay_before_return_html, mean_delay, and max_range fields of untrusted CrawlerRunConfig bodies. Unauthenticated attackers can send huge values to /crawl or /crawl/stream to hold browser pages or stall the rate limiter, exhausting the page pool and blocking other crawls.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| crawl4ai unclecode crawl4ai
pypi |
≥ 0; < 0.9.5 (affected, semver) 0.9.5 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 8.7 high |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA: VulnCheck |
Exploit evidence
- https://github.com/unclecode/crawl4ai/security/advisories/GHSA-rhjm-7hj7-75fx
exploit · ADP: CISA-ADP
References
- https://github.com/unclecode/crawl4ai/security/advisories/GHSA-rhjm-7hj7-75fxCNA: VulnCheck · vendor-advisory
- https://www.vulncheck.com/advisories/crawl4ai-before-0.9.5-denial-of-service-via-unbounded-crawlerrunconfig-delay-fieldsCNA: VulnCheck · third-party-advisory
- https://github.com/unclecode/crawl4ai/security/advisories/GHSA-rhjm-7hj7-75fxADP: CISA-ADP · exploit
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