Mermaid Lint MCP

Item: Mermaid Lint MCP
Rating: 56
Author: M8ven

A tool for validating Mermaid diagram syntax through CLI and MCP interfaces, providing real-time error checking and line-specific feedback. It enables AI assistants to self-validate and debug generated diagrams across all Mermaid types, ensuring valid visual documentation.

→ yaodebian/mermaid-lint-mcp · listed on glama

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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.

⚠️

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.

✅

No credential exfiltration, no sensitive file access, no obfuscation

Static analysis found nothing flowing your secrets to unexpected places.

✅

Open source with a license and README

Anyone can audit the code, the license is declared, and the publisher documents what it does.

// known CVEs in dependencies3 high3 medium1 low

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

high@modelcontextprotocol/sdk@1.19.1GHSA-345p-7cg4-v4c7

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

high@modelcontextprotocol/sdk@1.19.1GHSA-8r9q-7v3j-jr4g

Anthropic's MCP TypeScript SDK has a ReDoS vulnerability

high@modelcontextprotocol/sdk@1.19.1GHSA-w48q-cv73-mx4w

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

mediummermaid@11.12.0GHSA-87f9-hvmw-gh4p

Mermaid: Improper sanitization of configuration leads to CSS injection

mediummermaid@11.12.0GHSA-ghcm-xqfw-q4vr

Mermaid: Improper sanitization of `classDef` in state diagrams leads to HTML injection

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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 4 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/yaodebian-mermaid-lint-mcp-1r2eok)](https://m8ven.ai/mcp/yaodebian-mermaid-lint-mcp-1r2eok)

commit: a01a9d05063148eb1ed47bb51103b972d9341174

code hash: 5f2c5539499af8b3929cdfdc0b2a68a52fae9d96a625964c280375d73fc32784

verified: 6/17/2026, 12:22:48 PM

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