CVE-2026-86483: JetBrains Youtrack

Medium severity, CVSS 5.4. EPSS: 0.6% chance of exploitation in the next 30 days.

In JetBrains YouTrack before 2026.2.18634 stored XSS via a custom field on Agile board cards was possible

Affected products

• JetBrains Youtrack: before 2026.2.18634 (fixed in 2026.2.18634)

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