mcp-runtime-guard

Runtime proxy that intercepts and blocks MCP tool calls based on YAML-defined policies, enforcing security rules for AI agents like Claude Code or Cursor.

→ Shuin-Labs/mcp-runtime-guard · listed on glama

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// key findings

🚨

Known vulnerabilities in dependencies: 2 critical

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

// known CVEs in dependencies2 critical2 low

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

criticalvitest@2GHSA-5xrq-8626-4rwp

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

criticalvitest@2GHSA-9crc-q9x8-hgqq

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

lowjs-yaml@4.1.0GHSA-h67p-54hq-rp68

JS-YAML: Quadratic-complexity DoS in merge key handling via repeated aliases

lowjs-yaml@4.1.0GHSA-mh29-5h37-fv8m

js-yaml has prototype pollution in merge (<<)

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// 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 1 concrete improvement 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/shuin-labs-mcp-runtime-guard-z4a43k)](https://m8ven.ai/mcp/shuin-labs-mcp-runtime-guard-z4a43k)

commit: cda06eb5d0df0b09747003d899f591b4299af66a

code hash: 9ff78d6f806596d2bc46f581c6bbb301c99659a300ec5ccf0def139a79e3c4d1

verified: 6/22/2026, 1:25:50 PM

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