Vulnerability · Published Oct 29, 2026 · Assigned by VulnCheck

CVE-2026-119119Crawl4AI before 0.9.5 Denial of Service via Unbounded CrawlerRunConfig Delay Fields

High 7.5

In plain English

A high-severity resource allocation without limits in crawl4ai from unclecode. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.4%top 70.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
unclecode	crawl4ai	0 – before 0.9.5

Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

GitHub Security Advisory (GHSA-rhjm-7hj7-75fx) vendor-advisory
VulnCheck Advisory: Crawl4AI before 0.9.5 Denial of Service via Unbounded CrawlerRunConfig Delay Fields third-party-advisory