CVE-2026-108871 in JeecgBoot
Summary
by MITRE • 10/11/2026
JeecgBoot through 3.9.5 contains a missing authorization vulnerability in the saveDatarule handler of SysDepartRoleController that lets low-privileged authenticated users modify department role data rules. Attackers can send crafted permissionId, roleId and dataRuleIds values to overwrite data_rule_ids, widening row-level data access or altering filtering for other department roles.
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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 within the system's administrative module. Specifically, the flaw resides in the saveDatarule handler of the SysDepartRoleController class. This component is responsible for managing data rules associated with department roles, which are fundamental to enforcing row-level security and data isolation policies across different organizational units. The core issue stems from a missing authorization check that fails to verify whether the authenticated user possesses sufficient privileges to modify the specific role or data rule being targeted. Consequently, any low-privileged authenticated user can interact directly with this endpoint without encountering an access denial response.
From a technical perspective, the exploitation vector involves sending crafted HTTP requests containing manipulated permissionId, roleId, and dataRuleIds parameters. By manipulating these values, an attacker can overwrite the underlying database records for data_rule_ids associated with other department roles. This action effectively bypasses the intended logical separation of duties within the application's role-based access control model. The vulnerability allows attackers to inject arbitrary filtering conditions or remove existing restrictions, thereby altering how data is filtered and displayed for users assigned to those targeted roles.
The operational impact of this vulnerability is severe, as it directly compromises the integrity and confidentiality of row-level data security. By modifying these rules, an attacker can widen the scope of accessible data for other department roles beyond what was originally intended by system administrators. This could lead to unauthorized access to sensitive information belonging to different departments or user groups that should remain isolated from each other. In enterprise environments where JeecgBoot is deployed, such a flaw undermines trust in the application's ability to enforce strict multi-tenancy and role-based data segregation policies.
This vulnerability aligns with CWE-284, which describes Improper Access Control, specifically highlighting failures in verifying user permissions before performing sensitive operations. It also maps to MITRE ATT&CK technique T1078, Valid Accounts, as the attack relies on legitimate but low-level credentials to escalate privileges or modify security configurations. To mitigate this risk, developers must implement rigorous authorization checks within the saveDatarule handler to ensure that only users with explicit administrative rights can alter department role data rules. Additionally, implementing principle of least privilege and conducting regular code reviews for access control logic are essential steps to prevent similar vulnerabilities in future releases.