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

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-19 · updated 2026-10-19
Weakness: CWE-918

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

unclecode crawl4ai: from 0.8.7 through 0.9.5

References

https://github.com/unclecode/crawl4ai/blob/v0.9.5/crawl4ai/async_crawler_strategy.py
https://github.com/unclecode/crawl4ai/blob/v0.9.5/crawl4ai/ssl_certificate.py
https://github.com/unclecode/crawl4ai/blob/v0.9.5/deploy/docker/utils.py
https://github.com/unclecode/crawl4ai/pull/2304
https://www.vulncheck.com/advisories/crawl4ai-0.8.7-through-0.9.5-ssrf-bypass-via-sslcertificate-from-url-url-userinfo

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