CVE-2026-108825: RuoYi Privilege Escalation Vulnerability

CVE-2026-108825 Overview

CVE-2026-108825 is an improper privilege management vulnerability [CWE-266] affecting yangzongzhuan RuoYi versions up to and including 4.8.3. The flaw resides in the checkRoleAllowed function within the /system/role/authDataScope endpoint. Attackers can manipulate the roleKey argument to bypass role authorization controls remotely.

The exploit details have been publicly disclosed, increasing the likelihood of opportunistic abuse against exposed RuoYi deployments. According to the VulDB advisory, the vendor was contacted prior to disclosure but did not respond.

Critical Impact
Authenticated attackers can abuse role-key handling in /system/role/authDataScope to perform privilege management actions outside their intended scope, affecting integrity and availability of the role-based access control model.

Affected Products

yangzongzhuan RuoYi versions through 4.8.3
RuoYi /system/role/authDataScope endpoint (checkRoleAllowed function)
Deployments exposing the RuoYi admin management module to authenticated users

Discovery Timeline

2026-10-12 - CVE-2026-108825 published to the National Vulnerability Database (NVD)
2026-10-15 - Last updated in the NVD database

Technical Details for CVE-2026-108825

Vulnerability Analysis

The vulnerability exists in the checkRoleAllowed function invoked by the /system/role/authDataScope endpoint of the RuoYi management framework. This function is intended to enforce that an authenticated user operates only on roles permitted by their assigned scope. The implementation does not correctly validate the submitted roleKey argument against the caller's effective privileges.

An authenticated user with low privileges can supply a roleKey referencing a higher-privileged role and invoke the data-scope authorization operation. Because the authorization check is improperly implemented, the request proceeds without rejecting the elevated target. The outcome is a limited privilege management bypass that influences role-to-data-scope mappings used elsewhere in the application.

This class of weakness falls under CWE-266: Incorrect Privilege Assignment. It is exploitable over the network and requires low privileges but no user interaction.

Root Cause

The checkRoleAllowed method trusts the client-supplied roleKey without reconciling it against the caller's authorized role set. The authorization layer validates that the caller is authenticated and has access to the data-scope endpoint, but it fails to confirm that the targeted roleKey belongs to a role the caller is permitted to administer.

Attack Vector

Exploitation is performed remotely over HTTP against the RuoYi admin backend. The attacker must hold valid credentials for an account with access to the /system/role/authDataScope endpoint. The attacker then issues a crafted request manipulating the roleKey parameter to reference a role outside their intended administrative scope.

No authenticated code examples are published in the NVD record. Refer to the GitHub security report for RuoYi 4.8.3 and the VulDB entry for CVE-2026-108825 for technical reproduction details.

Detection Methods for CVE-2026-108825

Indicators of Compromise

HTTP requests to /system/role/authDataScope where the roleKey value does not match roles owned by the authenticated session
Audit log entries showing data-scope modifications applied to administrative roles (for example admin) initiated by non-administrator accounts
Repeated authDataScope requests from a single session enumerating multiple roleKey values
Unexpected changes to role-to-department or role-to-data-scope mappings in the RuoYi sys_role tables

Detection Strategies

Correlate web access logs against the application's user-to-role mapping to flag roleKey values the submitter should not be allowed to modify
Create a Web Application Firewall (WAF) rule that inspects POST requests to /system/role/authDataScope and matches on anomalous roleKey values targeting privileged roles
Enable verbose audit logging in the RuoYi SysRole service and alert on authDataScope operations against roles with elevated permissions

Monitoring Recommendations

Baseline normal administrator activity against /system/role/* endpoints and alert on deviations from least-privileged users
Monitor authentication logs for low-privileged accounts accessing role-management endpoints that are not part of their business function
Track database writes to the sys_role_dept and sys_role tables and tie them back to the originating session and HTTP request

How to Mitigate CVE-2026-108825

Immediate Actions Required

Restrict network access to the RuoYi admin interface so that /system/role/* endpoints are reachable only from trusted administrative networks
Review all accounts with permission to call /system/role/authDataScope and revoke access from users who do not require role administration
Audit sys_role and sys_role_dept tables for unauthorized data-scope changes made since the deployment of RuoYi 4.8.3 or earlier
Rotate credentials for any administrative accounts suspected of being leveraged in exploitation attempts

Patch Information

As of the NVD publication date, no vendor-supplied patch has been published. The VulDB advisory notes that the vendor was contacted but did not respond. Operators should track the upstream RuoYi repository for a fix and apply custom source-level mitigations to checkRoleAllowed in the interim.

Workarounds

Patch the checkRoleAllowed method locally to validate the submitted roleKey against the authenticated user's permitted role list before any data-scope operation proceeds
Place the RuoYi admin console behind a reverse proxy that enforces IP allow-listing and multi-factor authentication for administrator sessions
Deploy WAF signatures that reject requests to /system/role/authDataScope when the roleKey parameter references privileged roles such as admin
Reduce the blast radius by assigning the minimum necessary permissions to each RuoYi role and removing unused administrative accounts