CVE-2025-26492 in TeamCity
Summary
by MITRE • 02/11/2025
In JetBrains TeamCity before 2024.12.2 improper Kubernetes connection settings could expose sensitive resources
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Analysis
by VulDB Data Team • 05/16/2025
The vulnerability identified as CVE-2025-26492 affects JetBrains TeamCity versions prior to 2024.12.2 and relates to improper handling of Kubernetes connection settings that could potentially expose sensitive resources within containerized environments. This issue represents a critical security flaw in the configuration management of container orchestration platforms, particularly when integrating with Kubernetes infrastructure. The vulnerability arises from insufficient validation and sanitization of connection parameters used to establish communication between TeamCity and Kubernetes clusters, creating potential attack vectors for unauthorized access to containerized resources.
The technical flaw manifests when TeamCity administrators configure Kubernetes integration by specifying connection details including cluster endpoints, authentication tokens, and namespace configurations. The improper handling occurs during the validation process of these settings, where malformed or improperly sanitized inputs could lead to unintended resource exposure. This vulnerability falls under the CWE category of improper input validation, specifically CWE-20, which addresses weaknesses in input sanitization and validation processes. The flaw allows for potential information disclosure and privilege escalation attacks when Kubernetes connection parameters are improperly managed, particularly when default or insecure configurations are accepted without proper verification.
The operational impact of this vulnerability extends beyond simple information disclosure to encompass potential full system compromise within containerized environments. Attackers could exploit the improper connection handling to access sensitive Kubernetes resources including pods, services, config maps, and secrets that are normally protected by proper access controls. This exposure could lead to unauthorized code execution, data breaches, and complete compromise of the container orchestration environment. The vulnerability particularly affects organizations that rely heavily on Kubernetes for CI/CD pipelines and automated deployment processes, where TeamCity serves as a central orchestrator for build and deployment activities. According to ATT&CK framework, this vulnerability maps to T1078 Valid Accounts and T1566 Phishing, as it could enable attackers to leverage compromised credentials or misconfigured access controls to gain deeper access to cloud environments.
Mitigation strategies for CVE-2025-26492 require immediate patching of TeamCity installations to version 2024.12.2 or later, which includes proper validation and sanitization of Kubernetes connection settings. Organizations should implement strict access controls and audit logging for all Kubernetes connection parameters within TeamCity configurations. The remediation process involves reviewing and validating all existing Kubernetes integration settings, ensuring proper authentication token management, and implementing network segmentation between TeamCity servers and Kubernetes clusters. Security teams should also conduct comprehensive audits of all container orchestration configurations and implement continuous monitoring for unauthorized changes to connection settings. Additionally, organizations should consider implementing principle of least privilege access controls for Kubernetes resources and regularly rotate authentication credentials to minimize potential impact from any remaining vulnerabilities in the system.