CVE-2026-34090

7.5 HIGH

Published: May 11, 2026 Modified: May 14, 2026

Description

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

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

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://phabricator.wikimedia.org/T411366

Source: c4f26cc8-17ff-4c99-b5e2-38fc1793eacc

Issue Tracking Patch

1 reference(s) from NVD

Quick Stats

CVSS v3 Score

7.5 / 10.0

EPSS (Exploit Probability)

0.3%

20th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-200

Affected Vendors

mediawiki

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