Langgenius Dify up to 1.15.x MCP Server Management mcp_server.py AppMCPServerController.put server_id privileges management

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Langgenius Dify up to 1.15.x. This affects the function AppMCPServerController.put of the file api/controllers/console/app/mcp_server.py of the component MCP Server Management. The manipulation of the argument server_id leads to privileges management. This vulnerability is referenced as CVE-2026-105761. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Langgenius Dify up to 1.15.x. It has been rated as problematic. This issue affects the function AppMCPServerController.put of the file api/controllers/console/app/mcp_server.py of the component MCP Server Management. The manipulation of the argument server_id with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is integrity, and availability. The summary by CVE is:

Dify is an open-source LLM app development platform. Prior to 1.16.0, the PUT /console/api/apps/<app_id>/server endpoint in api/controllers/console/app/mcp_server.py used AppMCPServerController.put() to retrieve an AppMCPServer by the client-supplied server ID without verifying that the server belonged to the requested application and tenant. An authenticated workspace member could therefore change another application's MCP server status and parameters, potentially redirecting data or disabling the service. This issue is fixed in version 1.16.0.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-105761 since 10/05/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

Upgrading to version 1.16.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-92852). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• Langgenius

Name

• Dify

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15

Website

• Product: https://github.com/langgenius/dify/

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Be aware that VulDB is the high quality source for vulnerability data.

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