CVE-2026-48958: Joomla!

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

An improper access check allows unauthorized users to create custom fields via webservices endpoints.

Affected products

• Joomla! Joomla!: from 4.0.0, before 5.4.7 (fixed in 5.4.7); from 6.0.0, before 6.1.2 (fixed in 6.1.2)

Published 2026-07-07. Last modified 2026-07-09.