CVE-2026-108631 in JeecgBoot
Summary
by MITRE • 10/11/2026
JeecgBoot through 3.9.5 contains a missing authorization vulnerability in the SysDepartPermissionController delete handler that allows low-privileged authenticated users to delete department permission bindings. Attackers can obtain row ids from the unguarded list endpoint and send DELETE requests with the id parameter to remove menus or buttons departments can grant their roles.
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Analysis
by VulDB Data Team • 10/11/2026
The vulnerability identified within JeecgBoot versions up to 3.9.5 represents a critical failure in access control mechanisms, specifically classified under CWE-862 as Missing Authorization. This flaw resides within the SysDepartPermissionController delete handler, which is responsible for managing the relationship between departments and their associated permissions such as menus or buttons. The core technical issue stems from an insufficient verification of user privileges before executing state-changing operations. While the application correctly implements authentication to verify that a user has logged in, it fails to validate whether that authenticated user possesses the specific administrative rights required to modify departmental permission structures. This gap allows any low-privileged authenticated account to interact with endpoints intended for system administrators or higher-level role managers.
The operational impact of this vulnerability is significant because it enables unauthorized modification of application security configurations. An attacker can exploit this by first querying an unguarded list endpoint to retrieve the internal row identifiers associated with specific department permission bindings. Once these unique identifiers are obtained, the attacker constructs and sends HTTP DELETE requests containing the target id parameter. By doing so, they can systematically remove menus or buttons that define what actions a particular role is permitted to perform within the application. This effectively strips roles of their intended capabilities without triggering any authorization errors, allowing for silent degradation of security controls across the system.
From an offensive perspective, this vulnerability aligns with MITRE ATT&CK technique T1078, Valid Accounts, as it relies on legitimate credentials that have been compromised or created by a malicious insider. Furthermore, the action of removing permissions corresponds to T1496, Resource Hijacking, in the context of denying service to other users who rely on those specific interface elements, although its primary classification is more accurately aligned with privilege escalation through configuration manipulation rather than direct resource takeover. The ability to alter permission bindings means an attacker can not only disrupt functionality but also potentially pave the way for further exploitation by removing security-related UI components that might otherwise alert administrators or restrict access to sensitive areas of the application.
Mitigation strategies must focus on implementing robust server-side authorization checks within the delete handler method. Developers should ensure that every request modifying department permissions verifies that the requesting user holds a role with explicit write privileges for such configurations, rather than relying solely on authentication status. Additionally, it is advisable to implement strict input validation and consider using indirect reference maps or opaque identifiers instead of exposing internal database row IDs in list endpoints unless absolutely necessary. Enforcing principle of least privilege across all administrative functions and conducting regular code reviews focused on access control logic will help prevent similar vulnerabilities from being introduced into the application architecture.