SSRF in Unclecode Crawl4ai
CVE-2026-112363
Crawl4AI from 0.8.7 through 0.9.5 contains a server-side request forgery vulnerability in the Docker API server that allows unauthenticated attackers to bypass destination checks via URL userinfo parsing differences. Attackers can set fetch_ssl_certificate=true with crafted userinfo URLs so SSLCertificate.from_url connects to internal hosts on port 443, probing reachability and leaking certificate details.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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/pull/2304 (issue-tracking, patch)
- github.com/unclecode/crawl4ai/blob/v0.9.5/crawl4ai/ssl_certificate.py (technical-description)
- github.com/unclecode/crawl4ai/blob/v0.9.5/crawl4ai/async_crawler_strategy.py (technical-description)
- github.com/unclecode/crawl4ai/blob/v0.9.5/deploy/docker/utils.py (technical-description)
- www.vulncheck.com/advisories/crawl4ai-0.8.7-through-0.9.5-ssrf-bypass-via-sslce… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-112363?
- CVE-2026-112363 is a medium-severity vulnerability in Unclecode Crawl4ai, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.3/10. Published 2026-10-19.
- How severe is CVE-2026-112363?
- Medium severity. CVSS v3 base score is 5.3 out of 10.