Resource exhaustion in Unclecode Crawl4ai
CVE-2026-119119
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.
Published · last modified .
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.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/unclecode/crawl4ai/security/advisories/GHSA-rhjm-7hj7-75fx (vendor-advisory)
- www.vulncheck.com/advisories/crawl4ai-before-0.9.5-denial-of-service-via-unboun… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-119119?
- CVE-2026-119119 is a high-severity vulnerability in Unclecode Crawl4ai, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-10-29.
- How severe is CVE-2026-119119?
- High severity. CVSS v3 base score is 7.5 out of 10.