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.

Attack Vector Network

Attack Complexity High

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
The Wikimedia Foundation Mediawiki - WikiLambda Extension unaffected
Version Status Constraints
0 affected < 1.47.0

No data.

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Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://gerrit.wikimedia.org/r/c/mediawiki/extensions/WikiLambda/+/1326392 cve-icon cve-icon
https://phabricator.wikimedia.org/T435085 cve-icon cve-icon
History

Wed, 23 Sep 2026 19:00:00 +0000

Type Values Removed Values Added
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.
Title WikiLambda public function execution bypasses the unsaved-code permission through nested Z825 compositions
Weaknesses CWE-280
References
Metrics cvssV4_0

{'score': 2.9, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:P/AU:Y'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: wikimedia-foundation

Published:

Updated: 2026-09-23T19:35:06.350Z

Reserved: 2026-09-23T18:13:31.629Z

Link: CVE-2026-96872

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-23T19:19:55.327

Modified: 2026-09-23T19:19:55.327

Link: CVE-2026-96872

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses