mcp-slim-guard

Item: mcp-slim-guard
Rating: 42
Author: M8ven

Lightweight MCP security proxy — compression (up to 86%) + SSRF protection + allow/deny + audit + rate limiting + injection detection

→ lennney/mcp-slim-guard · listed on glama

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// key findings

🚨

Secret credentials may flow to a network call

1 flow detected: DEEPSEEK_API_KEY. We can’t prove the destination matches the brand the credential belongs to.

🚨

Known vulnerabilities in dependencies: 2 critical, 3 high

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

⚠️

Tests do not pass

Either the test suite is broken or the code regressed. Either way the published behaviour can’t be verified by the publisher’s own tests.

🔐

You'll be asked for 1 credential: DEEPSEEK_API_KEY

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

// known CVEs in dependencies2 critical3 high2 low

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@1.9.0GHSA-8r9q-7v3j-jr4g

Anthropic's MCP TypeScript SDK has a ReDoS vulnerability

high@modelcontextprotocol/sdk@1.9.0GHSA-w48q-cv73-mx4w

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

highjs-yaml@4.1.0GHSA-52cp-r559-cp3m

js-yaml: YAML merge-key chains can force quadratic CPU consumption

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.

configDEEPSEEK_API_BASE

🔐 secretDEEPSEEK_API_KEY

configDEEPSEEK_MODEL

// 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 9 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/lennney-mcp-slim-guard-1wnwg7)](https://m8ven.ai/mcp/lennney-mcp-slim-guard-1wnwg7)

commit: 86c28b11c5de0e8934acab4be1003342d53b5c31

code hash: 0bcce4c888d75e16feb1204f656fc22adf8e8a93ef19f9710a0aca23e1577c19

verified: 7/25/2026, 8:48:28 AM

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