GreyNoise-Intelligence/greynoise-mcp-server

Item: GreyNoise-Intelligence/greynoise-mcp-server
Rating: 60
Author: M8ven

MCP Server for the GreyNoise Enterprise API

→ GreyNoise-Intelligence/greynoise-mcp-server· npm: @greynoise/greynoise-mcp-server· listed on npm

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// key findings

⚠️

Known vulnerabilities in dependencies: 3 high

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

✅

No credential exfiltration, no sensitive file access, no obfuscation

Static analysis found nothing flowing your secrets to unexpected places.

🔐

You'll be asked for 1 credential: GREYNOISE_API_KEY

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

// known CVEs in dependencies3 high1 low

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

high@modelcontextprotocol/sdk@1.12.0GHSA-345p-7cg4-v4c7

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

high@modelcontextprotocol/sdk@1.12.0GHSA-8r9q-7v3j-jr4g

Anthropic's MCP TypeScript SDK has a ReDoS vulnerability

high@modelcontextprotocol/sdk@1.12.0GHSA-w48q-cv73-mx4w

Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default

lowtsup@8.0.0GHSA-3mv9-4h5g-vhg3

tsup DOM Clobbering vulnerability

Depend on this server? Get alerted when its CVEs change.Watch this server free →

// required environment variables

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

configGREYNOISE_API_BASE— no https://api.greynoise.io/ Override the API base (e.g. staging).

🔐 secretGREYNOISE_API_KEY— "env": { "": "your-greynoise-api-key" }

configMCP_ALLOWED_HOSTS— no 127.0.0.1:<port>,localhost:<port> Allowed Host header values (DNS-rebinding protection) for HTTP transport.

configMCP_SERVER_CMD

configMCP_VALIDATE_READONLY

configPORT— no 9191 HTTP transport listen port.

// 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/npm-https-github-com-greynoise-intelligence-greynoise-mcp-server)](https://m8ven.ai/mcp/npm-https-github-com-greynoise-intelligence-greynoise-mcp-server)

commit: d764fa8288e7a0ddecbfa65a2f72c400fcc8ba56

code hash: 9d91f1e0b446218f2e7f7063d265f8b5a9245d4b988c88b3a081fb25b1b99607

verified: 7/20/2026, 9:41:56 AM

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