CVE-2026-14165 in Tuleap Enterprise Edition
Summary
by MITRE • 07/13/2026
An Authorization Bypass Through User-Controlled Key vulnerability affecting Tuleap Enterprise Edition from 17.0 through 17.5 could allow an attacker to access data of other users without authorization.
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Analysis
by VulDB Data Team • 07/13/2026
This vulnerability represents a critical authorization flaw in Tuleap Enterprise Edition versions 17.0 through 17.5 that enables attackers to bypass user access controls by manipulating key parameters within the application. The issue stems from improper validation of user-controlled input that determines access permissions, allowing malicious actors to craft requests that grant them unauthorized access to resources belonging to other users within the system.
The technical implementation of this vulnerability occurs when the application fails to properly validate or sanitize user-supplied keys used for authorization decisions. This weakness creates a path where an attacker can manipulate these keys through crafted requests or parameters, effectively impersonating other users or bypassing authentication mechanisms entirely. The flaw operates at the application logic level where access control checks are insufficiently enforced, making it particularly dangerous as it can be exploited without requiring elevated privileges or credentials from legitimate users.
From an operational standpoint, this vulnerability poses significant risks to organizations using Tuleap Enterprise Edition in production environments where user data isolation is critical. Attackers could potentially access sensitive project information, personal user data, confidential documentation, and other resources that should remain restricted to authorized personnel only. The impact extends beyond simple data exposure as it can enable further exploitation through privilege escalation or lateral movement within the system. This type of vulnerability directly violates fundamental security principles of least privilege and principle of least authority.
The vulnerability aligns with CWE-285 which describes improper authorization scenarios, specifically focusing on situations where user-controllable input affects access control decisions without proper validation. From an ATT&CK framework perspective, this maps to privilege escalation techniques under T1068 and credential access patterns under T1580, as attackers can leverage this flaw to gain unauthorized access to other users' accounts and associated resources. Organizations may also face compliance violations if sensitive data is exposed due to this authorization bypass.
Mitigation strategies should include immediate patching of affected Tuleap versions to the latest releases that address this authorization bypass issue. Additionally, organizations should implement comprehensive input validation and sanitization for all user-controllable parameters used in access control decisions. Network segmentation and monitoring should be enhanced to detect unusual access patterns or parameter manipulation attempts. Regular security assessments and code reviews focusing on authentication and authorization logic are essential to prevent similar vulnerabilities from emerging in future releases. Organizations should also consider implementing additional access controls such as multi-factor authentication and continuous monitoring of user activities for anomalous behavior that might indicate exploitation attempts.