[20260914] - Core - MFA Authentication Bypass through rememberme cookies

Project: Joomla!
SubProject: CMS
Impact: High
Severity: Moderate
Probability: Moderate
Versions: 4.0.0-5.4.8,6.0.0-6.1.3
Exploit type: Authentication Bypass
Reported Date: 2026-09-10
Fixed Date: 2026-09-25
CVE Number: CVE-2026-92227

Description

The premature issuance of an rememberme cookie leads to a MFA bypass vulnerability.

Affected Installs

Joomla! CMS versions 4.0.0-5.4.8, 6.0.0-6.1.3

Solution

Upgrade to version 5.4.9, 6.1.4

Contact

The JSST at the Joomla! Security Centre.

Reported By: Google and Ada Logics, Mukul Goyal