CVE-2026-86500 in YouTrack
Summary
by MITRE • 09/07/2026
In JetBrains YouTrack before 2026.1.14047 a missing escalation check let a user with project update permissions grant themselves Project Admin
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Analysis
by VulDB Data Team • 09/07/2026
The vulnerability identified in JetBrains YouTrack prior to version 2026.1.14047 represents a critical authorization flaw rooted in the application's role assignment logic. Specifically, the system fails to perform an adequate escalation check when processing requests for project-level administrative privileges. In secure software architecture, privilege escalation controls must rigorously verify that the actor initiating a change possesses not only the baseline permissions required for the action but also meets any additional hierarchical or policy-based constraints necessary for elevated roles. The absence of this validation mechanism allows authenticated users who hold standard project update permissions to bypass intended access restrictions and assign themselves the Project Admin role within their respective projects.
From a technical perspective, this flaw constitutes an Insecure Direct Object Reference combined with Broken Access Control issues as defined by industry standards such as CWE-269 Improper Privilege Management and CWE-862 Missing Authorization. The vulnerability exploits the trust placed in user-supplied input during role modification operations without sufficient server-side validation of the requester's current privilege level relative to the target role being assigned. By manipulating the parameters associated with project administration assignments, an attacker can effectively elevate their own privileges from a standard contributor or updater to that of a full administrator for specific projects hosted on the instance.
The operational impact of this vulnerability is severe due to the extensive capabilities granted by Project Admin status within YouTrack. Once elevated, the compromised account gains unrestricted control over project configurations, issue tracking workflows, and user management settings associated with that project. This includes the ability to modify or delete any issues, alter workflow rules which can disrupt business continuity, manage time-tracking data, and potentially access sensitive information stored in custom fields or attachments. Furthermore, an attacker could create new users with elevated privileges, thereby establishing persistent backdoor access even if the initial compromised account is discovered and disabled. This undermines the integrity of project management processes and exposes organizational intellectual property to unauthorized disclosure or manipulation.
Mitigation strategies must prioritize immediate patching as well as compensating controls for environments where updates cannot be applied instantly. JetBrains has addressed this issue in version 2026.1.14047, so upgrading to this version or any later release is the primary remediation step. Administrators should also audit existing user roles and permissions to ensure that no users currently hold Project Admin status unless explicitly required for their job functions. Implementing strict role-based access control policies and regularly reviewing permission assignments can help minimize the blast radius of such vulnerabilities. Additionally, enabling comprehensive logging for privilege change events allows security teams to detect anomalous activity indicative of exploitation attempts in real time.