CVE-2026-59791: JetBrains Youtrack

Low severity, CVSS 3.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In JetBrains YouTrack before 2026.2.17012 cSS injection via Mermaid diagram rendering was possible

Affected products

• JetBrains Youtrack: before 2026.2.17012 (fixed in 2026.2.17012)

Published 2026-07-10. Last modified 2026-07-10.