CVE-2019-12156: JetBrains Upsource

Medium severity, CVSS 5.3. EPSS: 0.9% chance of exploitation in the next 30 days.

Server metadata could be exposed because one of the error messages reflected the whole response back to the client in JetBrains TeamCity versions before 2018.2.5 and UpSource versions before 2018.2 build 1293.

Affected products

• JetBrains Upsource: before 2018.2.1290 (fixed in 2018.2.1290)

Published 2019-10-02. Last modified 2026-06-17.