CVE-2026-105411 in Tuleap Enterprise Edition
Summary
by MITRE • 10/12/2026
An Authorization Bypass Through User-Controlled Key vulnerability affecting Tuleap Enterprise Edition from 17.0 through 17.5 could allow an attacker with tracker administration rights on one tracker to update or delete fields of all the trackers on the instance.
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Analysis
by VulDB Data Team • 10/12/2026
The identified vulnerability represents a critical authorization bypass within Tuleal Enterprise Edition, specifically impacting versions ranging from 17.0 through 17.5. This flaw is categorized under CWE-284, which describes Improper Access Control, and aligns with the MITRE ATT&CK technique of Privilege Escalation via Bypassing User Controls. The core issue stems from a failure in server-side validation logic when handling user-controlled keys associated with tracker administration tasks. In typical software architecture for project management platforms like Tuleap, trackers serve as containers for issues or work items, and each tracker often has its own set of configurable fields that define the data structure for entries within that specific container. The system is designed to enforce strict boundaries between these distinct entities, ensuring that administrative privileges granted on one tracker do not inadvertently grant control over others.
The technical flaw arises because the application fails to properly validate whether the user-controlled key provided in a request actually corresponds to the resource being modified or deleted. Instead of verifying that the administrator has explicit permissions for every specific field within the target tracker, the system relies on an insecure assumption regarding the scope of the administrative role. When an attacker with administration rights over Tracker A submits a request to modify fields, the backend logic incorrectly processes this action as applicable to all trackers associated with the instance rather than limiting it to Tracker A. This lack of object-level access control allows the malicious actor to manipulate metadata and field configurations across the entire platform without possessing the necessary credentials for those other resources.
The operational impact of this vulnerability is severe, particularly in multi-tenant or large-scale deployment environments where multiple teams manage separate trackers within a single instance. An attacker can exploit this flaw to delete critical fields from any tracker on the system, potentially causing data loss or rendering specific workflows unusable. Furthermore, by updating field definitions, an adversary could alter validation rules, change field types, or inject malicious configurations that compromise data integrity across all projects. This level of access effectively grants the attacker a form of global administrative control over the instance's configuration layer, bypassing the principle of least privilege and undermining the security model intended to isolate different teams' workspaces from one another.
Mitigation strategies must focus on immediate patching and rigorous input validation. The primary remediation is to upgrade Tuleal Enterprise Edition to a version that addresses this authorization logic error, ensuring that field modification requests are strictly bound to the specific tracker ID associated with the user's current administrative context. In addition to applying vendor patches, administrators should implement strict access control lists that verify permissions at every step of the request lifecycle, not just at the initial authentication stage. It is also advisable to audit existing logs for signs of unauthorized field modifications across multiple trackers and to enforce role-based access controls that minimize the number of users with broad administrative privileges wherever possible.