CVE-2026-103446 - Vulnerability Details - OpenCVE

Authorization bypass through User-Controlled key vulnerability in The Wikimedia Foundation MediaWiki WikiLambda extension allows Authentication Bypass. This issue affects MediaWiki WikiLambda extension: 1.46.

Attack Vector Network

Attack Complexity High

Privileges Required Low

Attack Requirements Present

User Interaction Passive

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact High

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact total

Vendors	Products
Wikimedia	Mediawiki-wikilambda Extension

No data.

No data.

References

Link	Providers
https://gerrit.wikimedia.org/r/q/If2c05b109672fc65f63372f86c768859dc6639fd
https://phabricator.wikimedia.org/T435086

History

Tue, 06 Oct 2026 19:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Thu, 01 Oct 2026 19:45:00 +0000

Type	Values Removed	Values Added
First Time appeared		Wikimedia Wikimedia mediawiki-wikilambda Extension
Vendors & Products		Wikimedia Wikimedia mediawiki-wikilambda Extension

Wed, 30 Sep 2026 17:30:00 +0000

Type	Values Removed	Values Added
Description		Authorization bypass through User-Controlled key vulnerability in The Wikimedia Foundation MediaWiki WikiLambda extension allows Authentication Bypass. This issue affects MediaWiki WikiLambda extension: 1.46.
Title		WikiLambda exposes anonymous execution of unsaved Abstract Wikipedia fragments
Weaknesses		CWE-639
References		https://gerrit.wikimedia.org/r/q/If2c05b109672fc65f63372f86c768859dc6639fd https://phabricator.wikimedia.org/T435086
Metrics		cvssV4_0 `{'score': 7.4, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/S:N/AU:Y/R:U/V:C/RE:M/U:Amber'}`

MITRE

Status: PUBLISHED

Assigner: wikimedia-foundation

Published: 2026-09-30T17:13:02.339Z

Updated: 2026-10-06T18:25:30.800Z

Reserved: 2026-09-30T15:41:01.270Z

Link: CVE-2026-103446

Vulnrichment

Updated: 2026-10-01T15:50:01.111Z

NVD

Status : Awaiting Analysis

Published: 2026-09-30T18:18:17.017

Modified: 2026-10-06T19:17:39.550

Link: CVE-2026-103446

Redhat

No data.

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