Server-Side Request Forgery in Crawl4AI by UncleCode
CVE-2026-109238

9.2CRITICAL

Key Information:

Vendor

Unclecode

Status
Crawl4ai
Vendor
CVE Published:
12 October 2026

What is CVE-2026-109238?

Crawl4AI versions 0.7.0 through prior to 0.9.4 are susceptible to a server-side request forgery vulnerability. This flaw allows API clients to access internal network addresses through manipulated requests that utilize the link_preview_config option. Attackers can control the request content by setting the include_external and include_patterns parameters, leading the AsyncUrlSeeder component to fetch sensitive internal and cloud-metadata links, exposing them through parsed head data. This poses a significant risk to the confidentiality and integrity of the affected systems.

Affected Version(s)

crawl4ai 0.7.0 < 0.9.4

crawl4ai 0.9.4

References

https://github.com/unclecode/crawl4ai/security/advisories...
vendor-advisory
https://www.vulncheck.com/advisories/crawl4ai-0.7.0-befor...
third-party-advisory

CVSS V4

Score:
9.2
Severity:
CRITICAL
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.