CVE-2026-100270 in YouTrack
Summary
by MITRE • 09/30/2026
In JetBrains YouTrack before 2026.2.19197 low-level Admin Read permission users could disclose integration credentials via import configurations
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Analysis
by VulDB Data Team • 09/30/2026
The vulnerability identified in JetBrains YouTrack prior to version 2026.2.19197 represents a significant authorization flaw within the application's administrative subsystem, specifically targeting users with low-level administrator privileges who possess read access but are not intended to have full system control. This issue stems from an improper implementation of Access Control Lists where the permission model fails to adequately restrict sensitive data retrieval operations during specific configuration import processes. The core technical flaw lies in how the application handles serialized integration configurations, allowing authenticated users with restricted administrative roles to bypass expected security boundaries and extract plaintext credentials associated with various third-party integrations configured within the system.
From a technical perspective, this vulnerability is classified under CWE-269 Improper Authorization, as it involves an actor exploiting insufficient checks on user permissions to access resources they should not be able to view. The attack vector typically requires initial authentication and a specific role assignment that grants read capabilities but was inadvertently extended to include the ability to query or export integration settings through import-related endpoints. When a user initiates an import configuration action, the backend logic processes the request in a manner that exposes existing stored secrets rather than merely validating the structure of incoming data. This behavior allows attackers to retrieve API keys, tokens, and other sensitive authentication material embedded within these configurations without triggering standard audit alerts or requiring higher-level privileges such as full system administration.
The operational impact of this vulnerability is severe due to the nature of the exposed data. Integration credentials often serve as gateways to external services including version control systems like GitHub or GitLab, communication platforms such as Slack or Microsoft Teams, and issue tracking dependencies across different environments. Compromise of these tokens can lead to unauthorized access to source code repositories, potential exfiltration of proprietary intellectual property, manipulation of project workflows through automated scripts, and lateral movement within the organization's broader IT infrastructure if those credentials are reused elsewhere. Furthermore, because YouTrack is often central to development operations, an attacker with this level of visibility could map out internal processes and identify further targets for exploitation based on the discovered integrations.
This incident aligns closely with MITRE ATT&CK technique T1530 Data from Cloud Storage Object or more broadly T1504 Communication Through Application Layer Protocols if used to exfiltrate data, though it is primarily an unauthorized access issue falling under TA0006 Credential Access and TA0007 Discovery. The lack of strict separation between read-only administrative functions and sensitive configuration retrieval highlights a common pitfall in enterprise software design where functional permissions are not granularly mapped to security contexts involving secret management.
To mitigate this risk, organizations running versions of YouTrack prior to 2026.2.19197 must immediately upgrade to the patched version which corrects the permission checks within the import configuration module. In addition to upgrading, administrators should rotate all integration credentials that were accessible via the vulnerable endpoints, assuming compromise is likely given the nature of information disclosure vulnerabilities. It is also recommended to review user role assignments and enforce the principle of least privilege by ensuring that low-level admin accounts do not possess unnecessary read access to sensitive configuration sections unless explicitly required for their operational duties. Implementing robust audit logging for all credential-related API calls can further aid in detecting any potential exploitation attempts before they result in significant data loss or system compromise.