CVE-2026-100376: Wikimedia Foundation Mediawiki - Templatesandbox Extension

Medium severity, CVSS 4.8. EPSS: 0.3% chance of exploitation in the next 30 days.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - TemplateSandbox Extension allows Cross-Site Scripting (XSS). This issue affects Mediawiki - TemplateSandbox Extension: from * before 1.46.1, 1.45.5, 1.43.10.

Affected products

• Wikimedia Foundation Mediawiki - Templatesandbox Extension

Published 2026-09-25. Last modified 2026-09-28.