CVE-2026-100244
Received Received - Intake

Exposure of Sensitive Information in MediaWiki CentralAuth Extension

Publication date: 2026-09-29

Last updated on: 2026-09-29

Assigner: wikimedia-foundation

Description
Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation Mediawiki - CentralAuth Extension allows Excavation. This issue affects Mediawiki - CentralAuth Extension: from * before 1.46.1, 1.45.5, 1.43.10.

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Meta Information

Published
2026-09-29
Last Modified
2026-09-29
Generated
2026-09-29
AI Q&A
2026-09-29
EPSS Evaluated
N/A
NVD
CVE-2026-100244
EUVD
EUVD-2026-89090

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
wikimedia mediawiki_centralauth_extension to 1.46.1 (exc)
wikimedia mediawiki_centralauth_extension 1.45.5
wikimedia mediawiki_centralauth_extension 1.43.10
wikimedia mediawiki_centralauth_extension From 1.43.10 (inc) to 1.46.1 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-200 The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

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Executive Summary

This vulnerability involves the exposure of sensitive information to unauthorized actors due to a flaw in the Wikimedia Foundation MediaWiki CentralAuth Extension. It affects versions before 1.46.1, 1.45.5, and 1.43.10.

Impact Analysis

An unauthorized actor could access sensitive data due to improper handling in the CentralAuth Extension. This may lead to data breaches, privacy violations, or unauthorized access to user accounts and information.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR, HIPAA, or other privacy regulations by exposing personal or sensitive data to unauthorized parties. Organizations may face legal penalties, fines, or reputational damage.

Mitigation Strategies

Update Mediawiki - CentralAuth Extension to version 1.46.1, 1.45.5, or 1.43.10 or later to address the vulnerability.

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