CVE-2026-103493: JetBrains Youtrack

High severity, CVSS 8.1. EPSS: 0.2% chance of exploitation in the next 30 days.

In JetBrains YouTrack before 2026.2.19422 stored XSS via Mermaid and LaTeX content was possible

Affected products

• JetBrains Youtrack: before 2026.2.19422 (fixed in 2026.2.19422)

Published 2026-10-01. Last modified 2026-10-01.