CVE-2026-108671 in JeecgBoot
Summary
by MITRE • 10/11/2026
JeecgBoot through 3.9.5 contains a missing authorization vulnerability that allows any authenticated user to read MCP server configurations because the queryById permission check is commented out. Attackers can obtain record ids from the unguarded /airag/app/queryById endpoint and retrieve MCP endpoint URLs, headers, and outbound authentication tokens.
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Analysis
by VulDB Data Team • 10/11/2026
The vulnerability identified in JeecgBoot versions up to 3.9.5 represents a critical failure in access control mechanisms, specifically categorized under CWE-284 as Improper Access Control. This flaw stems from the intentional or accidental removal of security checks within the application logic, where the permission validation for the queryById endpoint was commented out. In secure software architecture, every data retrieval operation involving sensitive configuration details must be preceded by a rigorous authorization check to ensure that the requesting user possesses the necessary privileges to access such information. By bypassing this essential gatekeeping step, the system fails to enforce role-based or attribute-based access controls, thereby exposing internal configurations to any entity that has successfully authenticated to the platform.
The operational impact of this vulnerability is severe due to the nature of the data exposed. The unguarded endpoint allows attackers with valid credentials to retrieve record identifiers and subsequently fetch detailed MCP server configurations. These configurations typically contain high-value targets such as external API endpoints, custom HTTP headers required for service communication, and outbound authentication tokens used to verify identity with downstream services. The exposure of these elements effectively grants an attacker the keys to interact with integrated systems on behalf of the application itself. This can lead to unauthorized data access across connected platforms, manipulation of business logic through injected parameters in headers, or further exploitation of trust relationships established by the compromised outbound authentication tokens.
From a threat modeling perspective aligned with MITRE ATT&CK frameworks, this vulnerability facilitates initial reconnaissance and lateral movement within an enterprise environment. The ability to enumerate internal service endpoints corresponds to techniques such as Discovery via API Endpoints (T1580) or Collection of Application Data. Once the attacker possesses valid authentication tokens for external services, they can leverage these credentials to perform actions like Impersonation (T1134), potentially escalating their privileges beyond what was originally granted within JeecgBoot by abusing trust relationships with other systems that accept those tokens as legitimate. This transforms a simple information disclosure issue into a potential chain of compromise affecting multiple integrated services.
Mitigation strategies must prioritize the immediate restoration of proper authorization checks in the source code. Developers should review all endpoints, particularly those handling sensitive configuration data like MCP server settings, to ensure that permission validation logic is active and correctly implemented before any database queries are executed. It is also advisable to implement a defense-in-depth approach by applying consistent access control filters at the framework level rather than relying solely on individual method annotations or checks. Additionally, rotating all exposed outbound authentication tokens immediately upon discovery of the breach is critical to invalidate any credentials that may have been harvested during the period of vulnerability exposure. Regular security audits and static code analysis tools configured to detect commented-out security logic can help prevent similar oversights in future development cycles.