Assessment
Why it matters
EPSS is 0.4%; technical severity is CVSS 10.0.
In JetBrains TeamCity before 2026.1.2, 2025.11.6 сode execution via Kotlin DSL sandbox escape was possible
Who should care
- Teams operating TeamCity
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether TeamCity is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Vendor advisory from www.jetbrains.com
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Treatment intelligence
Remediation intelligence
Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.
Verification noteAutomated link verification has not completed for this guidance yet.
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- CWE
- CWE-94
- Affected versions
- JetBrains TeamCity (End Excluding 2025.11.6 | Start Including 2026.1, End Excluding 2026.1.2)
- Fixed versions
- JetBrains TeamCity (Fixed from 2025.11.6, 2026.1.2)
- Published
- 23 July 2026
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
Signal timeline
- CVE published
- Latest EPSS score: 0.4%
- Signal calculated at 14