CVE-2026-103446

WikiLambda exposes anonymous execution of unsaved Abstract Wikipedia fragments

Published Sep 30, 2026 CVSS 4.0 · 7.4 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
wikimedia-foundation
Published
Updated
Oct 6, 2026, 6:25 PM
Reserved
Sep 30, 2026, 3:41 PM
Status
Awaiting Analysis
Published
Sep 30, 2026, 6:18 PM
Modified
Oct 6, 2026, 7:17 PM