MFA Authentication Bypass Vulnerability in Joomla! Core
CVE-2026-73337

8.2HIGH

Key Information:

Vendor

Joomla
Status
Joomla! Cms
Vendor
CVE Published:
18 August 2026

What is CVE-2026-73337?

A vulnerability in Joomla! Core allows an attacker to bypass multi-factor authentication (MFA) due to insufficient state checks. This weakness is present in Joomla versions 4.0.0 to 5.4.7 and 6.0.0 to 6.1.2, potentially enabling unauthorized access despite active 2FA measures. Users are advised to update their systems to ensure that authentication processes are secured against this flaw.

Affected Version(s)

Joomla! CMS 4.0.0-5.4.6

Joomla! CMS 6.0.0-6.1.2

References

https://www.joomla.org/
product
https://developer.joomla.org/security-centre/20260807-cor...
vendor-advisory

CVSS V4

Score:
8.2
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

bloman
.