Bug 2469089 (CVE-2026-34091) - CVE-2026-34091 mediawiki: user localization leaked by AbuseFilter + EventStream
Summary: CVE-2026-34091 mediawiki: user localization leaked by AbuseFilter + EventStream
Keywords:
Status: NEW
Alias: CVE-2026-34091
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2477610
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-11 16:02 UTC by OSIDB Bzimport
Modified: 2026-05-19 12:23 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Description OSIDB Bzimport 2026-05-11 16:02:55 UTC 
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.
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