What’s Vulnerable › Vulnerabilities

CVE-2026-105761: Dify: IDOR in AppMCPServer PUT Endpoint Allows Modification of Other Apps' MCP Servers

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-05 · updated 2026-10-06
• Weakness: CWE-639

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.

Affected products

• langgenius dify: before 1.16.0

References

• https://github.com/langgenius/dify/commit/62cb5b586504b730731e28e743c038b72950058e
• https://github.com/langgenius/dify/pull/38177
• https://github.com/langgenius/dify/releases/tag/1.16.0
• https://github.com/langgenius/dify/security/advisories/GHSA-ccrj-frp2-c945

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