CVE-2026-41130
Published:April 21, 2026
Updated:April 25, 2026
Craft CMS is a content management system (CMS). In versions on the 4.x branch through 4.17.8 and the 5.x branch through 5.9.14, the "resource-js" endpoint in Craft CMS allows unauthenticated requests to proxy remote JavaScript resources.
When "trustedHosts" is not explicitly restricted (default configuration), the application trusts the client-supplied Host header. This allows an attacker to control the derived "baseUrl", which is used in prefix validation inside "actionResourceJs()". By supplying a malicious Host header, the attacker can make the server issue arbitrary HTTP requests, leading to Server-Side Request Forgery (SSRF). Versions 4.17.9 and 5.9.15 patch the issue.
Affected Packages
https://github.com/craftcms/cms.git (GITHUB):
Affected version(s) >=4.0.0-RC1 <4.17.9Fix Suggestion:
Update to version 4.17.9https://github.com/craftcms/cms.git (GITHUB):
Affected version(s) >=5.0.0-RC1 <5.9.15Fix Suggestion:
Update to version 5.9.15craftcms/cms (PHP):
Affected version(s) >=4.0.0-RC1 <4.17.9Fix Suggestion:
Update to version 4.17.9craftcms/cms (PHP):
Affected version(s) >=5.0.0-RC1 <5.9.15Fix Suggestion:
Update to version 5.9.15Related Resources (2)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.5
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
HIGH
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
Exploit Maturity
POC
CVSS v3
Base Score:
5.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Server-Side Request Forgery (SSRF)
EPSS
Base Score:
0.04
