Summary
It was discovered that MediaWiki incorrectly handled group membership
visibility in the OATHAuth extension. An authenticated attacker could
use this issue to determine if other users had two-factor authentication
enabled. (CVE-2026-34087)
It was discovered that MediaWiki incorrectly handled suppressed log entry
titles in the RecentChanges list. An unauthenticated attacker could use
this issue to view titles of deleted or suppressed pages that should be hidden.
(CVE-2026-34088)
It was discovered that MediaWiki incorrectly handled resource loading timing
information. An attacker could use this issue to determine if certain pages
existed on a wiki. (CVE-2026-34092)
Fixed packages 3
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · Pro 20.04 LTS Pro:20.04:LTS | mediawiki | 1:1.31.7-1ubuntu0.1~esm1 |
| Ubuntu · Pro 22.04 LTS Pro:22.04:LTS | mediawiki | 1:1.35.6-1ubuntu0.1~esm1 |
| Ubuntu · Pro 24.04 LTS Pro:24.04:LTS | mediawiki | 1:1.39.7-1ubuntu0.1~esm1 |
Vulnerabilities 3
-
Medium 5.1
Users API leaks whether privileged users have their user groups disabled for lack of 2FA
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation OATHAuth. This issue affects OATHAuth: from * before 1.43.7, 1.44.4, 1.45.2.
-
Low 2.1
Block UI elements in 'tools'-sidebar shows presence of an autoblocked IP
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Skin/Skin.Php. This issue affects MediaWiki: from * before 1.43.7, 1.44.4, 1.45.2.
-
Low 1.3
RecentChanges entries expose suppressed content via generated log page html
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.