CVE-2026-100254: OS Command Injection
Published Sep 30, 2026
·Updated
In JetBrains TeamCity before 2026.2, 2026.1.4, 2025.11.8 authenticated users could execute commands on Windows servers via CRLF injection in Pipeline Git connection settings
Affected Software
1 affected component
JetBrains TeamCity<2026.2, <2026.1.4, <2025.11.8
Event History
Sep 30, 2026
CVE Published
via MITRE·03:17 PM
Data Sourced
via MITRE·03:17 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·04:16 PM
DescriptionSeverityWeakness
Frequently Asked Questions
1
Who can exploit this issue?
An authenticated TeamCity user can exploit it. The attack is network-accessible, requires low privileges, and does not require user interaction.
2
Which TeamCity deployments are affected?
TeamCity versions before 2026.2, 2026.1.4, and 2025.11.8 are affected when Windows servers are involved. The command execution occurs through CRLF injection in Pipeline Git connection settings.
3
What is the potential impact?
Successful exploitation can allow command execution on Windows servers. The stated impact includes high confidentiality, integrity, and availability impact.