What is CVE-2024-56356?

CVE-2024-56356 is a medium-severity vulnerability in Jetbrains Teamcity, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 5.9/10. Published 2024-12-20.

How severe is CVE-2024-56356?

Medium severity. CVSS v3 base score is 5.9 out of 10.

XXE in Jetbrains Teamcity

CVE-2024-56356

In JetBrains TeamCity before 2024.12 insecure XMLParser configuration could lead to potential XXE attack

Vulnerability class: XXE (XML External Entity)

Published 2024-12-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (13.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 13.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Jetbrains Teamcity — versions 0

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

References

www.jetbrains.com/privacy-security/issues-fixed/ (Vendor Advisory)

Frequently asked questions

What is CVE-2024-56356?: CVE-2024-56356 is a medium-severity vulnerability in Jetbrains Teamcity, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 5.9/10. Published 2024-12-20.
How severe is CVE-2024-56356?: Medium severity. CVSS v3 base score is 5.9 out of 10.