CVE-2026-96872
Received Received - Intake

Insufficient Permission Handling in MediaWiki WikiLambda Extension

Publication date: 2026-09-23

Last updated on: 2026-09-23

Assigner: wikimedia-foundation

Description
Improper handling of insufficient permissions or privileges vulnerability in The Wikimedia Foundation Mediawiki - WikiLambda Extension on Linux, MacOS, and Windows allows Accessing Functionality Not Properly Constrained by ACLs. This issue affects Mediawiki - WikiLambda Extension: before 1.47.0.

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Meta Information

Published
2026-09-23
Last Modified
2026-09-23
Generated
2026-09-24
AI Q&A
2026-09-23
EPSS Evaluated
N/A
NVD
CVE-2026-96872
EUVD
EUVD-2026-85562

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
the_wikimedia_foundation mediawiki_wikilambda_extension to 1.47.0 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-280 The product does not handle or incorrectly handles when it has insufficient privileges to access resources or functionality as specified by their permissions. This may cause it to follow unexpected code paths that may leave the product in an invalid state.

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Executive Summary

This vulnerability involves improper handling of insufficient permissions in the Wikimedia Foundation Mediawiki - WikiLambda Extension. It allows attackers to access functionality that should be restricted by access control lists (ACLs). The issue affects versions before 1.47.0 on Linux, MacOS, and Windows.

Impact Analysis

An attacker could exploit this to perform unauthorized actions within the WikiLambda Extension. This may lead to data leaks, unauthorized modifications, or disruption of services if the extension is used in a collaborative or public-facing environment.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating confidentiality requirements in GDPR and HIPAA. Organizations using affected versions may face compliance violations, legal penalties, and reputational damage due to potential data breaches.

Mitigation Strategies

Update the Mediawiki - WikiLambda Extension to version 1.47.0 or later to address the improper permissions handling vulnerability.

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