RCE in Unclecode Crawl4ai
CVE-2026-119121
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
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-qj46-wp7m-rgj8 (vendor-advisory)
- www.vulncheck.com/advisories/crawl4ai-0.9.0-before-0.9.5-javascript-injection-v… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-119121?
- CVE-2026-119121 is a medium-severity vulnerability in Unclecode Crawl4ai, classified under Eval Injection. CVSS score: 4.3/10. Published 2026-10-29.
- How severe is CVE-2026-119121?
- Medium severity. CVSS v3 base score is 4.3 out of 10.