CVE-2026-39839: Mediawiki Cargo

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in Wikimedia Foundation Mediawiki - Cargo Extension allows Stored XSS.This issue affects Mediawiki - Cargo Extension: before 3.8.7.

Affected products

• Mediawiki Cargo: before 3.8.7 (fixed in 3.8.7)

Published 2026-04-07. Last modified 2026-07-24.