Dify: IDOR in AppMCPServer PUT Endpoint Allows Modification of Other Apps' MCP Servers

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-105761
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-05 23:17:03 UTC
Updated2026-10-05 23:17:03 UTC
DescriptionDify 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.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

Problem Types: CWE-639 | CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Langgenius Dify affected < 1.16.0 Not specified

References

ReferenceSourceLinkTags
github.com/langgenius/dify/pull/38177 [email protected] github.com
github.com/langgenius/dify/commit/62cb5b586504b730731e28e743c038b72950058e [email protected] github.com
github.com/langgenius/dify/releases/tag/1.16.0 [email protected] github.com
github.com/langgenius/dify/security/advisories/GHSA-ccrj-frp2-c945 [email protected] github.com
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