CVE-2026-100254: CWE-78 in JetBrains TeamCity
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
AI Analysis
Technical Summary
This vulnerability (CVE-2026-100254) in JetBrains TeamCity allows authenticated users to execute arbitrary commands on Windows servers by exploiting a CRLF injection flaw in the Pipeline Git connection settings. It affects versions prior to 2026.2, 2026.1.4, and 2025.11.8. The CVSS 3.1 score is 8.8, indicating high impact on confidentiality, integrity, and availability. No vendor advisory or patch links are provided in the input data.
Potential Impact
Successful exploitation allows authenticated users to execute arbitrary commands on Windows servers running TeamCity, potentially leading to full system compromise. The impact includes complete loss of confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until official fixes are confirmed, restrict access to TeamCity to trusted users only and monitor for suspicious activity related to Pipeline Git connection settings.
CVE-2026-100254: CWE-78 in JetBrains TeamCity
Description
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
CVSS v3.1
Score 8.8high
Affected software
JetBrains
TeamCity
pkg:github/jetbrains/TeamCityRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-100254) in JetBrains TeamCity allows authenticated users to execute arbitrary commands on Windows servers by exploiting a CRLF injection flaw in the Pipeline Git connection settings. It affects versions prior to 2026.2, 2026.1.4, and 2025.11.8. The CVSS 3.1 score is 8.8, indicating high impact on confidentiality, integrity, and availability. No vendor advisory or patch links are provided in the input data.
Potential Impact
Successful exploitation allows authenticated users to execute arbitrary commands on Windows servers running TeamCity, potentially leading to full system compromise. The impact includes complete loss of confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until official fixes are confirmed, restrict access to TeamCity to trusted users only and monitor for suspicious activity related to Pipeline Git connection settings.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- JetBrains
- Date Reserved
- 2026-09-25T17:02:02.459Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6abd2c302a4e24523d2ec2f0
Added to database: 09/30/2026, 15:35:12 UTC
Last enriched: 09/30/2026, 16:03:22 UTC
Last updated: 10/01/2026, 04:03:38 UTC
Views: 11
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