CVE-2026-92119 in Allura
Summary
by MITRE • 10/13/2026
REST API Mass Assignment vulnerability in Apache Allura.
This issue affects Apache Allura: through 1.21.0.
Users are recommended to upgrade to version 1.22.0, which fixes the issue.
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Analysis
by VulDB Data Team • 10/13/2026
The vulnerability identified as a REST API Mass Assignment flaw within Apache Allura represents a critical security misconfiguration in how the application processes incoming data for user and project objects via its web service interface. Apache Allura is an open-source platform designed to host software development projects, providing tools such as issue tracking, code hosting, wikis, and forums. The core of this vulnerability lies in the framework's handling of HTTP POST or PUT requests where client-supplied parameters are directly mapped to internal object properties without sufficient validation or filtering. In a typical implementation, developers may use convenience methods that automatically bind all incoming form fields or JSON keys to corresponding attributes on a model instance. When these mechanisms lack explicit allow-lists for permissible fields, an authenticated attacker can manipulate the request payload to include additional parameters intended for administrative functions or sensitive system configurations.
This specific flaw allows attackers to perform unauthorized modifications to user accounts and project settings by injecting fields that are not typically exposed through standard web forms but are accessible via the API. For instance, a malicious actor could alter their own role from a regular contributor to an administrator, modify email addresses associated with other users, or change critical configuration flags within projects. The operational impact is severe because it bypasses normal authorization checks that rely on UI-based interactions rather than backend validation logic. Since mass assignment vulnerabilities often stem from trusting the structure of user input implicitly, they can lead to privilege escalation, data integrity compromise, and potential denial of service if sensitive fields are corrupted with invalid data types or values.
From a classification perspective, this vulnerability aligns closely with CWE-915: Improper Control of Dynamically-Managed Code Resources, specifically falling under the sub-category of Mass Assignment. It also maps to MITRE ATT&CK techniques related to Account Manipulation and Privilege Escalation, as attackers leverage API endpoints to modify account properties that should be restricted to system administrators or protected by additional authentication factors. The risk is amplified in multi-tenant environments like Apache Allura where one user's ability to escalate privileges can impact the security posture of shared projects or other users within the same instance.
Mitigation strategies primarily involve upgrading to version 1.22.0, which addresses this issue by implementing stricter input validation and enforcing explicit allow-lists for API endpoints. For organizations unable to upgrade immediately due to compatibility constraints, temporary mitigations include disabling public access to affected REST APIs if they are not required for external integrations. Additionally, developers should review custom plugins or extensions that interact with the Allura core to ensure they do not replicate this pattern of unchecked parameter binding. Implementing robust input validation frameworks and conducting regular code audits focused on API endpoints can further reduce the attack surface associated with dynamic object mapping in web applications.