CVE-2026-0574: Yeqifu Warehouse Auth Bypass Vulnerability

CVE-2026-0574 Overview

A vertical privilege escalation vulnerability has been identified in yeqifu warehouse up to commit aaf29962ba407d22d991781de28796ee7b4670e4. This vulnerability affects the saveUserRole function within the file warehouse\src\main\java\com\yeqifu\sys\controller\UserController.java of the Request Handler component. The flaw stems from improper authorization controls that allow authenticated users to manipulate role assignments, potentially escalating their privileges to higher access levels.

Critical Impact

Authenticated attackers can exploit this improper authorization vulnerability remotely to escalate their privileges, potentially gaining administrative access to the warehouse management system.

Affected Products

• yeqifu warehouse (up to commit aaf29962ba407d22d991781de28796ee7b4670e4)
• Request Handler component - UserController.java
• saveUserRole function within the user management system

Discovery Timeline

• 2026-01-04 - CVE-2026-0574 published to NVD
• 2026-01-08 - Last updated in NVD database

Technical Details for CVE-2026-0574

Vulnerability Analysis

This vulnerability is classified as CWE-266 (Incorrect Privilege Assignment), which occurs when a product assigns incorrect privileges to an actor, creating an unintended sphere of control for that actor. In the context of yeqifu warehouse, the saveUserRole function fails to properly validate whether the requesting user has appropriate authorization to modify user roles.

The vulnerability is exploitable over the network and requires low privileges to execute. An attacker with basic authenticated access can leverage this flaw to perform vertical privilege escalation, meaning they can elevate their own permissions or assign elevated roles to other accounts they control. This represents a significant security risk as it bypasses the intended access control hierarchy of the application.

The public availability of exploit documentation increases the risk of this vulnerability being actively exploited in the wild. Organizations using yeqifu warehouse should prioritize remediation efforts.

Root Cause

The root cause of this vulnerability lies in the improper authorization implementation within the saveUserRole function in UserController.java. The function fails to adequately verify that the requesting user possesses the necessary privileges to modify role assignments before processing the request. This allows lower-privileged users to assign themselves or others higher-level roles, effectively bypassing the application's access control mechanisms.

The lack of proper authorization checks before role modification operations is a common security oversight in user management systems. In this case, the function appears to trust the user input without validating the requester's authority to perform such privileged operations.

Attack Vector

The attack is network-based and can be executed remotely by any authenticated user of the system. The exploitation process involves sending specially crafted requests to the vulnerable saveUserRole endpoint with manipulated role parameters.

The vulnerability mechanism works as follows:

1. An attacker authenticates to the yeqifu warehouse application with low-privileged credentials
2. The attacker crafts a request to the saveUserRole endpoint in UserController.java
3. The request includes parameters that assign elevated role privileges
4. Due to missing authorization checks, the server processes the request
5. The attacker's account (or a controlled account) receives elevated privileges

For detailed technical analysis and proof-of-concept information, refer to the GitHub PoC Documentation.

Detection Methods for CVE-2026-0574

Indicators of Compromise

• Unexpected role changes in user accounts, particularly privilege elevations for low-level users
• Suspicious HTTP POST requests to the saveUserRole endpoint containing role manipulation parameters
• Audit log entries showing role assignment operations performed by users without administrative privileges
• Multiple rapid role change requests originating from the same user session

Detection Strategies

• Implement Web Application Firewall (WAF) rules to monitor and alert on requests to the saveUserRole endpoint, especially those containing role escalation parameters
• Deploy application-level logging to capture all role modification operations with full request context including the requesting user's current role
• Configure Security Information and Event Management (SIEM) rules to correlate role change events with the privilege level of the initiating user
• Conduct regular access control audits to identify any unauthorized privilege assignments

Monitoring Recommendations

• Enable detailed audit logging for all user management functions within the yeqifu warehouse application
• Monitor for anomalous patterns in user role assignment activities, particularly assignments of administrative roles
• Implement real-time alerting for any role modification operations outside of approved change windows
• Review application access logs regularly for requests to UserController.java endpoints from unexpected sources

How to Mitigate CVE-2026-0574

Immediate Actions Required

• Restrict access to the saveUserRole endpoint to only authenticated administrators until a patch is applied
• Implement additional network-level access controls to limit which users can reach the vulnerable endpoint
• Review all existing user role assignments to identify any unauthorized privilege escalations
• Enable comprehensive logging on the affected endpoint to track any exploitation attempts

Patch Information

This product uses a rolling release strategy for continuous delivery, meaning specific version numbers are not available. Organizations should update to the latest commit from the official repository that addresses this vulnerability. Monitor the VulDB entry and the project repository for updates regarding the fix.

Since no specific patch version is available, it is critical to implement the workarounds below while monitoring for the official fix.

Workarounds

• Implement server-side authorization middleware that validates user permissions before processing any role modification requests
• Add explicit role-based access control (RBAC) checks within the saveUserRole function to ensure only users with administrative privileges can modify roles
• Temporarily disable the saveUserRole functionality if not critical to operations until a proper fix is available
• Implement request validation to ensure the requesting user's session contains appropriate administrative credentials

# Configuration example - Restrict access to UserController endpoints
# Add to your web server or application gateway configuration

# For Apache - add to .htaccess or virtual host config
<Location "/warehouse/sys/user/saveUserRole">
    Require group admin
    AuthType Basic
    AuthName "Admin Access Required"
</Location>

# For Nginx - add to server block
location /warehouse/sys/user/saveUserRole {
    auth_basic "Admin Access Required";
    allow 10.0.0.0/8;  # Restrict to internal admin network
    deny all;
}