What is CVE-2024-27199?

CVE-2024-27199 is a high-severity vulnerability in Jetbrains Teamcity, classified under Relative Path Traversal. CVSS score: 7.3/10. Published 2024-03-04.

How severe is CVE-2024-27199?

High severity. CVSS v3 base score is 7.3 out of 10.

Is CVE-2024-27199 known to be exploited?

Yes. CVE-2024-27199 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-04-20), indicating it is being actively exploited. 30 public proof-of-concept repositories are indexed.

Path Traversal in Jetbrains Teamcity

CVE-2024-27199

In JetBrains TeamCity before 2023.11.4 path traversal allowing to perform limited admin actions was possible

Published 2024-03-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 1.000 (100.0th percentile), scored 2026-09-14.

Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 100.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Affected products

Jetbrains Teamcity — versions 0

Weakness classification (CWE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2026-04-20. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2026-05-04.

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

www.jetbrains.com/privacy-security/issues-fixed/ (Vendor Advisory)
www.darkreading.com/cyberattacks-data-breaches/jetbrains-teamcity-mass-exploita… (Press/Media Coverage)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (Exploit)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2024-27199?: CVE-2024-27199 is a high-severity vulnerability in Jetbrains Teamcity, classified under Relative Path Traversal. CVSS score: 7.3/10. Published 2024-03-04.
How severe is CVE-2024-27199?: High severity. CVSS v3 base score is 7.3 out of 10.
Is CVE-2024-27199 known to be exploited?: Yes. CVE-2024-27199 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-04-20), indicating it is being actively exploited. 30 public proof-of-concept repositories are indexed.