Missing Authorization in Joomla! - CVE-2026-90913
Published: September 30, 2026
Vulnerability identifier: #VU152891
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90913
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform unauthorized mutation actions.
The vulnerability exists due to improper access control in access level webservice endpoints when handling mutation actions. A remote attacker can send requests to the affected endpoints to perform unauthorized mutation actions.
Affected software
Joomla!
How to mitigate CVE-2026-90913
Install security update from vendor's website.
Joomla! - addressed in versions 5.4.9, 6.1.4