CVE-2026-103046: The Wikimedia Foundation Mediawiki - Wikilambda Extension

Medium severity, CVSS 6.1. EPSS: 0.2% chance of exploitation in the next 30 days.

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Wikimedia Foundation MediaWiki - WikiLambda extension allows Stored XSS. This issue affects MediaWiki - WikiLambda extension: before 1.46.1.

Affected products

• The Wikimedia Foundation Mediawiki - Wikilambda Extension: before 1.46.1 (fixed in 1.46.1)

Published 2026-09-29. Last modified 2026-09-30.