Improper access control in Joomla! - CVE-2026-71574
Published: August 18, 2026
Vulnerability identifier: #VU144200
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-71574
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to bypass access restrictions and perform unauthorized mutation actions.
The vulnerability exists due to improper access control in webservice endpoints when handling mutation requests. A remote user can send a crafted request to bypass access restrictions and perform unauthorized mutation actions.
The issue affects mutation actions that were restricted in the backend UI.
Affected software
Joomla!
How to mitigate CVE-2026-71574
Install security update from vendor's website.
Joomla! - addressed in versions 5.4.8, 6.1.3