CVE-2026-28195 is a medium-severity vulnerability in JetBrains TeamCity, published on February 25, 2026. This vulnerability allows project developers to add parameters to build configurations due to missing authorization checks. The impact of this vulnerability could lead to unauthorized modifications in build processes, potentially affecting the integrity of the software development lifecycle.
The CVSS score assigned to this vulnerability is 4.3, indicating a medium level of risk. Organizations using JetBrains TeamCity should be aware that the attack vector is through the network, with low complexity and low privileges required to exploit the vulnerability. This makes it accessible for potential attackers to manipulate build configurations if left unaddressed.
Risk to organizations includes unauthorized changes to build configurations, which could lead to application vulnerabilities and compromised software integrity. As such, organizations should prioritize patching JetBrains TeamCity to version 2025.11.3 or later immediately.
Currently, there are no known public exploits or proof of concept code available for this vulnerability. This indicates a lower immediate threat; however, organizations should not underestimate the risk of exploitation as attackers often develop new methods quickly.
Vulnerability Details
In JetBrains TeamCity before 2025.11.3, missing authorization allowed project developers to add parameters to build configurations. This vulnerability is classified under CWE-862, indicating a lack of necessary authorization checks. The CVSS score of 4.3 reflects a medium severity level, with an attack vector through the network, low attack complexity, and required privileges being low. No user interaction is necessary, making this vulnerability particularly concerning.
Technical Analysis
The root cause of CVE-2026-28195 stems from insufficient authorization mechanisms within JetBrains TeamCity, which allows project developers to manipulate build configurations without proper checks. The vulnerability can be exploited through network access, requiring low privileges, which makes it a target for threat actors aiming to compromise build integrity.
The attack complexity is classified as low, meaning that the steps to exploit this vulnerability are straightforward and do not require advanced skills. As it stands, attackers may leverage this vulnerability with minimal effort and without needing any user interaction.
Confidentiality is not impacted, but integrity can be affected due to unauthorized modifications to build configurations. Availability is not impacted, but the changes made could lead to downstream effects on application deployment and operational stability.
Risk & Impact Analysis
Organizations using JetBrains TeamCity should conduct a thorough risk assessment regarding this vulnerability. The potential for an attacker to alter build configurations poses a significant risk to software integrity and security. Failure to address this vulnerability can lead to unauthorized access to sensitive development processes and potentially harmful software deployments.
Given the medium severity, organizations should address this vulnerability in their priority patch cycle. The exploitability score indicates that while there are no known public exploits, the risk remains high enough to warrant immediate attention.
With the EPSS score being extremely low, the likelihood of exploitation may seem minimal; however, organizations should not rely solely on this metric. Continuous monitoring and timely remediation are necessary to mitigate risks associated with CVE-2026-28195.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
This vulnerability affects all versions of JetBrains TeamCity prior to 2025.11.3. Organizations should ensure they upgrade to this or later versions to mitigate the associated risks.
Mitigation & Remediation
Organizations should prioritize patching JetBrains TeamCity to the latest version, specifically version 2025.11.3 or later. If immediate patching is not possible, consider implementing the following workarounds:
1. Review and restrict user permissions to limit access to build configurations.
2. Monitor build configuration changes closely for any unauthorized modifications.
3. Consider implementing additional network controls to restrict access to the TeamCity server.
For further guidance on remediation, organizations can refer to our penetration testing services to validate their security posture.
Detection Guidance
To detect potential exploitation attempts of this vulnerability, organizations should monitor the following indicators:
1. Log changes to build configurations in TeamCity.
2. Identify any unauthorized access attempts to the TeamCity server.
3. Monitor for unusual patterns of activity related to build modifications.
AppSecure Threat Intelligence Insight
CVE-2026-28195 highlights the importance of robust authorization mechanisms in software development tools. The vulnerability represents a common oversight where insufficient checks can lead to significant risks in the development lifecycle.
Organizations should take this incident as a lesson to regularly audit their security measures, particularly around access controls and permissions.
For further insights into building secure development environments, refer to our resources on vulnerability management and effective security practices.
Additionally, organizations should consider leveraging penetration testing methodologies to proactively identify and remediate potential vulnerabilities.
Organizations can also explore API security testing best practices as part of their overall security strategy.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)