What is CVE-2026-65906?

CVE-2026-65906 is a high-severity vulnerability in Jetbrains Teamcity, classified under Code Injection. CVSS score: 8.8/10. Published 2026-07-23.

How severe is CVE-2026-65906?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Jetbrains Teamcity

CVE-2026-65906

In JetBrains TeamCity before 2026.1.2, 2025.11.6 сode execution via Kotlin DSL sandbox escape was possible

Vulnerability class: RCE (Remote Code Execution)

Published 2026-07-23 · last modified 2026-08-11.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (50.9th percentile), scored 2026-10-22.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.007 · change: +0.001

Affected products

Jetbrains Teamcity — versions 0

Weakness classification (CWE)

CWE-94 — Code Injection

References

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

Frequently asked questions

What is CVE-2026-65906?: CVE-2026-65906 is a high-severity vulnerability in Jetbrains Teamcity, classified under Code Injection. CVSS score: 8.8/10. Published 2026-07-23.
How severe is CVE-2026-65906?: High severity. CVSS v3 base score is 8.8 out of 10.