CVE-2026-86487: JetBrains Youtrack

Low severity, CVSS 3.1. EPSS: 0.2% chance of exploitation in the next 30 days.

In JetBrains YouTrack before 2026.2.18634 a crafted WebSocket message allowed read-only whiteboard users to modify canvas content

Affected products

• JetBrains Youtrack: before 2026.2.18634 (fixed in 2026.2.18634)

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