Server-Side Request Forgery Vulnerability in Craft CMS by Pixel & Tonic
CVE-2026-41130

5.5MEDIUM

Key Information:

Vendor

Craftcms

Status
Cms
Vendor
CVE Published:
21 April 2026

What is CVE-2026-41130?

Craft CMS, a popular content management system, is vulnerable to Server-Side Request Forgery (SSRF) due to the resource-js endpoint allowing unauthenticated requests to proxy remote JavaScript resources. When the trustedHosts setting is not explicitly restricted (which is the default configuration), the application relies on the client-supplied Host header. This trust enables an attacker to manipulate the baseUrl used in prefix validation. By sending a malicious Host header, the attacker can force the server to issue arbitrary HTTP requests, potentially exposing sensitive data or conducting further exploitative actions. This issue has been addressed in versions 4.17.9 and 5.9.15.

Affected Version(s)

cms >= 5.0.0-RC1, < 5.9.15 < 5.0.0-RC1, 5.9.15

cms >= 4.0.0-RC1, < 4.17.9 < 4.0.0-RC1, 4.17.9

References

https://github.com/craftcms/cms/security/advisories/GHSA-...
x_refsource_CONFIRM
https://github.com/craftcms/cms/commit/ebe7e85f1c89700d64...
x_refsource_MISC

CVSS V4

Score:
5.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.