CRLF Injection in JetBrains TeamCity Affects Windows Server Command Execution
CVE-2026-100254

8.8HIGH

Key Information:

Vendor

Jetbrains
Status
Teamcity
Vendor
CVE Published:
30 September 2026

What is CVE-2026-100254?

In JetBrains TeamCity versions prior to 2026.2, a vulnerability exists that allows authenticated users to perform command execution on Windows servers through CRLF injection in the Pipeline Git connection settings. This flaw can be exploited by an attacker with valid user credentials, potentially compromising server integrity and enabling unauthorized access to sensitive commands.

Affected Version(s)

TeamCity Windows 0 < 2026.2, 2026.1.4, 2025.11.8

References

https://www.jetbrains.com/privacy-security/issues-fixed/

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.