CVE-2026-103439

Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki Wikbase extension allows Cross-Site Scripting (XSS). This issue affects MediaWiki Wikbase extension: 1.46, 1.45, and 1.43.

  • Published Sep 30, 2026
  • CVSS 0.3 low
  • 0.1% chance of exploitation in the next 30 days (EPSS)

Affected software

CVE-2026-103439 at the National Vulnerability Database