CVE-2026-103446: The Wikimedia Foundation Mediawiki Wikilambda Extension

High severity, CVSS 7.4. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• The Wikimedia Foundation Mediawiki Wikilambda Extension: version 1.46 only

Published 2026-09-30. Last modified 2026-10-06.