Wikimedia Foundation MediaWiki up to 1.46.x WikiLambda Extension permission

Summaryinfo

A vulnerability was found in Wikimedia Foundation MediaWiki up to 1.46.x. It has been declared as critical. Impacted is an unknown function of the component WikiLambda Extension. The manipulation results in permission. This vulnerability was named CVE-2026-96872. The attack may be performed from remote. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Wikimedia Foundation MediaWiki up to 1.46.x. It has been classified as critical. Affected is some unknown processing of the component WikiLambda Extension. The manipulation with an unknown input leads to a permission vulnerability. CWE is classifying the issue as CWE-275. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at phabricator.wikimedia.org. This vulnerability is traded as CVE-2026-96872 since 09/23/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1222.

It is declared as proof-of-concept.

Upgrading to version 1.47.0 eliminates this vulnerability.

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Productinfo

Type

• Content Management System

Vendor

• Wikimedia Foundation

Name

• MediaWiki

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26
• 1.27
• 1.28
• 1.29
• 1.30
• 1.31
• 1.32
• 1.33
• 1.34
• 1.35
• 1.36
• 1.37
• 1.38
• 1.39
• 1.40
• 1.41
• 1.42
• 1.43
• 1.44
• 1.45
• 1.46

License

• open-source

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Entryinfo

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