mediawiki: Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki
CVE-2026-34091 is fixed in 2 products on 1 platform, first by mediawiki 1:1.43.8+dfsg-2, released May 11, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| mediawiki · Debian 13.5 (trixie) | 1:1.43.8+dfsg-1~deb13u1 | DEBIAN-CVE-2026-34091 | May 15, 2026 |
| mediawiki · Debian 14 | 1:1.43.8+dfsg-1 | DEBIAN-CVE-2026-34091 | May 15, 2026 |
| mediawiki · Ubuntu 26.04.1 LTS (resolute) | 1:1.43.8+dfsg-2 | mediawiki 1:1.43.8+dfsg-2 | May 11, 2026 |
| mediawiki-classes · Ubuntu 26.04.1 LTS (resolute) | 1:1.43.8+dfsg-2 | mediawiki-classes 1:1.43.8+dfsg-2 | May 11, 2026 |
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