High severity7.5NVD Advisory· Published May 11, 2026· Updated May 14, 2026

CVE-2026-34090

Description

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation CheckUser.

This issue affects CheckUser: from 1.45.0 before 1.45.2.

MediaWiki/Checkuser
cpe:2.3:a:mediawiki:checkuser:*:*:*:*:*:mediawiki:*:*
Range: >=1.45.0,<1.45.2

No patches discovered yet.

AI mechanics synthesis has not run for this CVE yet.

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