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CVE-2026-34091

HighCVSS 7.5/10Last modified Oct 26, 2026

Description

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

Affected software

Vendor	Product	Versions
Wikimedia Foundation	MediaWiki	< 1.43.7, 1.44.4, 1.45.2

References

https://phabricator.wikimedia.org/T411305Issue Tracking, Vendor Advisory

Timeline

Published: May 11, 2026
Last modified: Oct 26, 2026
NVD status: Analyzed

Related CVEs from 2026

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CVE-2026-34091: High severity, CVSS 7.5 | Vulnix