Input validation error in Craft CMS - CVE-2026-41130
Published: June 16, 2026
Vulnerability identifier: #VU134669
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-41130
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform server-side request forgery.
The vulnerability exists due to improper input validation in AppController::actionResourceJs() when handling requests to the resource-js endpoint with a crafted Host header and url parameter. A remote attacker can send a specially crafted request to perform server-side request forgery.
Exploitation requires the default configuration where trustedHosts is not explicitly restricted.
Affected software
Craft CMS
How to mitigate CVE-2026-41130
Install security update from vendor's website.
Craft CMS - addressed in versions 4.17.9, 5.9.15