M365 Graph MCP Server

Model Context Protocol server wrapping Microsoft Graph API for OneDrive, SharePoint, and Calendar with read and write operations, plus Teams meeting transcript support.

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// key findings

🚨

Known vulnerabilities in dependencies: 2 critical, 1 high

Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.

🔐

You'll be asked for 1 credential: M365_CLIENT_SECRET

These are read from process.env at runtime. Make sure you trust where they’ll be sent.

// known CVEs in dependencies2 critical1 high

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

criticalvitest@3.0.0GHSA-5xrq-8626-4rwp

When Vitest UI server is listening, arbitrary file can be read and executed

criticalvitest@3.0.0GHSA-9crc-q9x8-hgqq

Vitest allows Remote Code Execution when accessing a malicious website while Vitest API server is listening

high@modelcontextprotocol/sdk@1.25.2GHSA-345p-7cg4-v4c7

@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse

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// required environment variables

This server reads these from process.env. You'll be asked to provide them before it can run.

configM365_CLIENT_ID— Microsoft Entra application (client) ID for the registered app.

🔐 secretM365_CLIENT_SECRET— Client secret for the registered app. Stored only in the consumer's environment; never in .juvant/config.json.

configM365_DOWNLOAD_DIR— Override the per-tenant sandbox directory used by download_file. Default: $XDG_CACHE_HOME/m365-graph-mcp-server/<tenant-id> or ~/.cache/m365-graph-mcp-server/<tenant-id>.

configM365_TENANT_ID— then edit .env.local with your , M365_CLIENT_ID,

configMCP_SERVER_LOG_LEVEL— Log level for diagnostics on stderr (default info).

configXDG_CACHE_HOME— M365_DOWNLOAD_DIR Override the per-tenant sandbox directory used by download_file. Default: $/m365-graph-mcp-server/<tenant-id> or ~/.cache/m365-graph-mcp-server/<tenant-id>.

// full audit trail

The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.

// improvement guidance — verified publishers only

We have 2 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.

// embed badge in your README

[![M8ven Score](https://m8ven.ai/badge/mcp/juvantlabs-m365-graph-mcp-server-15igtl)](https://m8ven.ai/mcp/juvantlabs-m365-graph-mcp-server-15igtl)

commit: b6694003b4357b7ab104caf6343fbf601c07ab74

code hash: 6e29c8c3d8757e32ec348b68ef805b31d0e25f9c9d7c46e9935ffa0277a837c9

verified: 6/14/2026, 10:23:45 AM

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