CVE-2026-86491: JetBrains Youtrack

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

In JetBrains YouTrack before 2026.2.18634 stored XSS was possible via project and organization icon uploads

Affected products

• JetBrains Youtrack: before 2026.2.18634 (fixed in 2026.2.18634)

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