CVE-2026-58036: Mediawiki

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Api/ApiQueryAllUsers.Php, includes/Api/ApiQueryUsers.Php, includes/Permissions/PermissionManager.Php, includes/User/UserGroupManager.Php.

Affected products

• Mediawiki Mediawiki: version 1.46.0 only

Published 2026-07-01. Last modified 2026-07-09.