CVE-2026-34091
Received Received - Intake
Exposure of Sensitive Information in MediaWiki

Publication date: 2026-05-11

Last updated on: 2026-05-11

Assigner: wikimedia-foundation

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.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-05-11
Last Modified
2026-05-11
Generated
2026-06-21
AI Q&A
2026-05-11
EPSS Evaluated
2026-06-19
NVD
CVE-2026-34091
EUVD
EUVD-2026-29063
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
wikimedia mediawiki From 1.43.7 (exc) to 1.45.2 (inc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-200 The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Compliance Impact

The vulnerability involves exposure of sensitive information to an unauthorized actor in Wikimedia Foundation MediaWiki.

Such exposure of sensitive information can potentially lead to non-compliance with data protection regulations and standards like GDPR and HIPAA, which require protection of personal and sensitive data from unauthorized access.

However, specific impacts on compliance or regulatory requirements are not detailed in the provided information.

Executive Summary

This vulnerability is an Exposure of Sensitive Information to an Unauthorized Actor in Wikimedia Foundation MediaWiki. It affects versions before 1.43.7, 1.44.4, and 1.45.2. Essentially, it allows unauthorized users to access sensitive information that should be protected.

Impact Analysis

The impact of this vulnerability is that sensitive information may be exposed to unauthorized actors. This can lead to information leakage, which might compromise privacy, security, or confidentiality of data managed or stored by MediaWiki.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-34091. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart