CVE-2026-34091
7.5
HIGH
CVSS 3.1
EPSS 0.05%
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.
How to fix CVE-2026-34091
To remediate CVE-2026-34091, upgrade the affected package to a fixed version below.
- Debian/mediawiki—upgrade to 1:1.43.8+dfsg-1~deb13u1 or later
Is CVE-2026-34091 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1:1.43.8+dfsg-1~deb13u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |