CVE-2026-34090CWE-200

Suggested investigations: Handle suppressed usernames

Medium · published May 11, 2026

CVSS v4.0
4.8
EPSS
0%
Percentile
31.3
In the wild
Unconfirmed
What it is

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation CheckUser.

This issue affects CheckUser: from 1.45.0 before 1.45.2.

The record
Technical detail
CVSS v4.0
4.8 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/R:U
EPSS
0.00384 · 31.3th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2026-05-11T14:50Z
EPSS history
Timeline
  • 11 MAY 14:50Z
    Suggested investigations: Handle suppressed usernames
    cvelistv5