Server-Side Request Forgery Vulnerability in Crawl4AI by UncleCode
CVE-2026-112363

6.9MEDIUM

Key Information:

Vendor

Unclecode

Status
Crawl4ai
Vendor
CVE Published:
19 October 2026

What is CVE-2026-112363?

Crawl4AI versions 0.8.7 through 0.9.5 exhibit a server-side request forgery vulnerability within the Docker API server. This flaw permits unauthenticated attackers to circumvent destination checks by exploiting differences in URL userinfo parsing. By setting 'fetch_ssl_certificate=true' with specially crafted userinfo URLs, an attacker can manipulate the SSLCertificate.from_url method to connect to internal hosts on port 443. This behavior potentially allows for probing of internal systems and the leakage of sensitive certificate details.

Affected Version(s)

crawl4ai 0.8.7 <= 0.9.5

References

https://github.com/unclecode/crawl4ai/pull/2304
patchissue-tracking
https://github.com/unclecode/crawl4ai/blob/v0.9.5/crawl4a...
technical-description
https://github.com/unclecode/crawl4ai/blob/v0.9.5/crawl4a...
technical-description

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

2gg-bit
Zachariah Mithani
.