CVE-2026-108870 in JeecgBoot
Summary
by MITRE • 10/11/2026
JeecgBoot through 3.9.5 contains a missing authorization vulnerability in the SysRoleController saveDatarule handler that allows low-privileged authenticated users to modify role data rules. Attackers can send permissionId, roleId and dataRuleIds to overwrite data_rule_ids, clearing row-level filters to widen readable records or altering filtering for other 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 SysRoleController component. Specifically, the saveDatarule handler lacks proper authorization checks that verify whether the authenticated user possesses sufficient privileges to modify role data rules. This flaw allows low-privileged authenticated users to execute unauthorized administrative actions by manipulating input parameters such as permissionId, roleId, and dataRuleIds. By sending these crafted requests, an attacker can overwrite existing row-level filters associated with specific roles. The core technical issue stems from the application's failure to validate that the requesting user is authorized to manage the target role or its associated permissions, effectively bypassing intended security boundaries through insecure direct object references or broken access control logic.
The operational impact of this vulnerability is significant as it directly compromises data integrity and confidentiality within the enterprise resource planning system. By clearing row-level filters, an attacker can widen the scope of readable records for a targeted role, potentially exposing sensitive organizational data to users who should not have access. Alternatively, altering filtering criteria for other roles can restrict or redirect legitimate user access, leading to operational disruptions or denial of service conditions where authorized personnel are unable to view necessary information. This capability effectively grants low-privileged users administrative control over security configurations, undermining the principle of least privilege and allowing lateral movement within the application's permission structure.
From a classification perspective, this vulnerability aligns with CWE-269, which denotes Improper Privilege Management, as it involves an actor obtaining privileges they are not entitled to hold or use for unintended purposes. It also corresponds to CWE-862, Missing Authorization, because the system fails to enforce access control policies on specific resources during critical operations. In terms of offensive security frameworks, this behavior maps to MITRE ATT&CK technique T1078, Valid Accounts, where attackers leverage existing credentials to perform unauthorized actions due to flawed backend logic rather than credential theft or exploitation of authentication flaws.
Mitigation strategies must focus on implementing robust server-side authorization checks within the saveDatarule endpoint. Developers should ensure that every request modifying role data rules verifies that the authenticated user has explicit administrative rights for the specific roleId being modified, not just general login credentials. Implementing role-based access control (RBAC) with strict validation of ownership and permissions is essential to prevent unauthorized modifications. Additionally, applying input validation to restrict permissible values for permissionId and dataRuleIds can reduce the attack surface. Regular security audits and penetration testing focusing on privilege escalation vectors are recommended to identify similar gaps in other controllers before they can be exploited in production environments.