Executive Summary

CVE-2026-2076 is an improper authorization vulnerability in the yeqifu warehouse project, specifically affecting the User Management Endpoint in the UserController.java file. The functions addUser, updateUser, and deleteUser lack proper authorization checks, allowing any authenticated user to perform critical user management operations without verifying their permissions.

This flaw enables unauthorized users to create new user accounts, modify existing user details, or delete users, including administrative accounts. The vulnerability is remotely exploitable with low attack complexity, and a proof-of-concept exploit is publicly available.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': 'This vulnerability can be detected by monitoring and testing the user management endpoints for improper authorization. Specifically, attempts to invoke the addUser, updateUser, or deleteUser functions without proper permissions indicate the presence of the vulnerability.'}, {'type': 'paragraph', 'content': 'Suggested commands include sending HTTP requests to the affected endpoints to verify if unauthorized actions are possible. For example, using curl to test deletion of a user by ID without proper authorization:'}, {'type': 'list_item', 'content': 'curl -X POST http://<target>/user/deleteUser/19 -b cookie.txt'}, {'type': 'paragraph', 'content': "Where '19' is the user ID to delete and 'cookie.txt' contains authentication cookies of a low-privileged user. If the request succeeds and the user is deleted, the vulnerability exists."}, {'type': 'paragraph', 'content': 'Similarly, testing creation or update of users via POST requests to /user/addUser or /user/updateUser endpoints without proper authorization checks can confirm the vulnerability.'}] [2]

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Mitigation Strategies

Currently, no patches or official mitigations are available for this vulnerability as the vendor has not responded or provided countermeasures.

Immediate steps to mitigate the risk include:

• Restrict access to the user management endpoints (addUser, updateUser, deleteUser) to trusted administrators only, for example by network segmentation or firewall rules.
• Implement additional access control mechanisms externally, such as API gateways or reverse proxies enforcing role-based access control.
• Monitor logs for suspicious activity involving user management endpoints to detect exploitation attempts.
• Consider replacing the affected component with an alternative product that properly enforces authorization.

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Impact Analysis

[{'type': 'paragraph', 'content': 'This vulnerability can have severe impacts including unauthorized account creation, modification, and deletion within the system.'}, {'type': 'list_item', 'content': 'Any authenticated user can create new accounts, potentially adding backdoor users.'}, {'type': 'list_item', 'content': "Users can arbitrarily modify other users' data, compromising data integrity."}, {'type': 'list_item', 'content': 'Users can delete legitimate accounts, including administrative users, leading to denial of service or privilege escalation.'}, {'type': 'paragraph', 'content': 'Overall, this leads to compromised confidentiality, integrity, and availability of the system.'}] [1, 2, 3]

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