CVE-2026-58031: Mediawiki

Medium severity, CVSS 5.4. 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. This vulnerability is associated with program files resources/src/mediawiki.Special.Apisandbox/ApiSandboxLayout.Js. This issue affects MediaWiki: from 1.46.0-rc.0 before 1.46.0.

Affected products

• Mediawiki Mediawiki: version 1.46.0 only

Published 2026-07-01. Last modified 2026-07-09.