CVE-2026-23899: Joomla!

High severity, CVSS 8.8. EPSS: 0.4% chance of exploitation in the next 30 days.

An improper access check allows unauthorized access to webservice endpoints.

Affected products

• Joomla! Joomla!: from 3.0.0, before 5.4.4 (fixed in 5.4.4); from 6.0.0, before 6.0.4 (fixed in 6.0.4)

Published 2026-04-01. Last modified 2026-06-17.