CVE-2026-86497: JetBrains Youtrack

Medium severity, CVSS 6.8. EPSS: 0.5% chance of exploitation in the next 30 days.

In JetBrains YouTrack before 2026.2.18769 changing a mailbox host without re-authentication allowed a project administrator to exfiltrate stored mailbox credentials

Affected products

• JetBrains Youtrack: before 2026.2.18769 (fixed in 2026.2.18769)

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