Vulnerability · Published Oct 19, 2026 · Assigned by VulnCheck

CVE-2026-112363Crawl4AI 0.8.7 through 0.9.5 SSRF Bypass via SSLCertificate.from_url URL Userinfo

Medium 5.3

In plain English

A medium-severity server-side request forgery 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 0.2% (higher than 6% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.2%top 93.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
unclecode	crawl4ai	0.8.7 – through 0.9.5

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References

https://github.com/unclecode/crawl4ai/pull/2304 patch, issue-tracking
https://github.com/unclecode/crawl4ai/blob/v0.9.5/crawl4ai/ssl_certificate.py technical-description
https://github.com/unclecode/crawl4ai/blob/v0.9.5/crawl4ai/async_crawler_strategy.py technical-description
https://github.com/unclecode/crawl4ai/blob/v0.9.5/deploy/docker/utils.py technical-description
VulnCheck Advisory: Crawl4AI 0.8.7 through 0.9.5 SSRF Bypass via SSLCertificate.from_url URL Userinfo third-party-advisory