What is CVE-2019-12156?

CVE-2019-12156 is a medium-severity vulnerability in Jetbrains Upsource, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 5.3/10. Published 2019-10-02.

How severe is CVE-2019-12156?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Information disclosure in Jetbrains Upsource

CVE-2019-12156

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.

Published 2019-10-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (59.4th percentile), scored 2026-10-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Jetbrains Upsource

Weakness classification (CWE)

CWE-209 — Generation of Error Message Containing Sensitive Information

References

blog.jetbrains.com/blog/2019/09/26/jetbrains-security-bulletin-q2-2019/ (Vendor Advisory)

Frequently asked questions

What is CVE-2019-12156?: CVE-2019-12156 is a medium-severity vulnerability in Jetbrains Upsource, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 5.3/10. Published 2019-10-02.
How severe is CVE-2019-12156?: Medium severity. CVSS v3 base score is 5.3 out of 10.