CVE-2026-86490: JetBrains Youtrack

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

In JetBrains YouTrack before 2026.2.18634 improper permission checks allowed overwriting of bundled apps via the app import endpoint

Affected products

• JetBrains Youtrack: before 2026.2.18634 (fixed in 2026.2.18634)

Published 2026-09-07. Last modified 2026-09-08.