CVE-2026-105761 Dify: IDOR in AppMCPServer PUT Endpoint Allows Modification of Other Apps' MCP Servers
An authenticated user can modify other applications' MCP server configurations due to missing ownership checks, potentially redirecting data or disabling services.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-105761?
CVE-2026-105761 is a high-severity missing authorization vulnerability in langgenius dify, published on 5 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-639
Which versions are affected by CVE-2026-105761?
How do I fix CVE-2026-105761?
No fix has been published for CVE-2026-105761 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-105761 being exploited?
There is no known exploitation of CVE-2026-105761 in the wild and no public exploit code.
Sources
Also known as GHSA-ccrj-frp2-c945.