CVE-2026-34091CWE-200

User localization leaked by AbuseFilter + EventStream

Medium · published May 11, 2026

CVSS v4.0
5.5
EPSS
0%
Percentile
32.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.5 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/R:U
EPSS
0.00398 · 32.8th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2026-05-11T14:55Z
EPSS history
Timeline
  • 11 MAY 14:55Z
    User localization leaked by AbuseFilter + EventStream
    cvelistv5