Code Injection in Craft CMS - CVE-2026-55794
Published: June 16, 2026
Vulnerability identifier: #VU134678
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-55794
CWE-ID: CWE-94
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary code.
The vulnerability exists due to improper neutralization of user-controlled input in entry saving redirect handling when processing a user-controlled Referer header. A remote user can supply a specially crafted Referer header to execute arbitrary code.
Exploitation requires control panel access and permission to edit an entry.
Affected software
Craft CMS
How to mitigate CVE-2026-55794
Install security update from vendor's website.
Craft CMS - update to 5.10.0