CVE-2026-86492: JetBrains Youtrack

High severity, CVSS 8.5. EPSS: 0.9% chance of exploitation in the next 30 days.

In JetBrains YouTrack before 2026.2.18634 a shared token cache allowed cross-tenant theft of GitHub App installation tokens

Affected products

• JetBrains Youtrack: before 2026.2.18634 (fixed in 2026.2.18634)

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