CVE-2026-34091 User localization leaked by AbuseFilter + EventStream

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...

CVE-2026-34091

CVE-2026-34091 affects Wikimedia Foundation MediaWiki prior to versions 1.43.7, 1.44.4 and 1.45.2, exposing sensitive information to unauthorized actors. The connected sources confirm an information disclosure issue in MediaWiki with those versions. Debian advisory DSA-6208-1 states fixes for Med...

CVE-2026-34091 User localization leaked by AbuseFilter + EventStream

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...