Vulnerability · Published Oct 29, 2026 · Assigned by VulnCheck

CVE-2026-119121Crawl4AI 0.9.0 before 0.9.5 JavaScript Injection via css_selector and wait_for

Medium 4.3

In plain English

A medium-severity security flaw in crawl4ai from unclecode. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.3%top 78.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Crawl4AI from 0.9.0 before 0.9.5 contains a JavaScript injection vulnerability in the Docker API server that allows authenticated API clients to run arbitrary JavaScript in the crawl page via allowlisted css_selector and wait_for fields. Attackers can inject quotes into css_selector or supply js: conditions in wait_for, bypassing the js_code block to alter page state and returned crawl content.

Affected products (as reported)

Vendor	Product	Versions
unclecode	crawl4ai	0.9.0 – before 0.9.5

Weakness: CWE-95 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

References

GitHub Security Advisory (GHSA-qj46-wp7m-rgj8) vendor-advisory
VulnCheck Advisory: Crawl4AI 0.9.0 before 0.9.5 JavaScript Injection via css_selector and wait_for third-party-advisory