CVE-2026-34091

High · 7.5

CVSS

7.5

EPSS

0.4%

Published

May 11, 2026

CISA due date

—

The record

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This issue affects MediaWiki: from * before 1.43.7, 1.44.4, 1.45.2.

Affected packages

Ecosystem	Package	Introduced	Fixed