Local Browser MCP

A headless, agent-controllable real browser as an MCP server that enables AI agents to navigate, click, fill, eval JavaScript, and take screenshots on localhost and allowed hosts, with no GUI required.

→ NolanLT/local-browser-mcp · listed on glama

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// key findings

⚠️

Known vulnerabilities in dependencies: 4 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.

✅

Open source with a license and README

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

🔐

You'll be asked for 1 credential: LOCAL_BROWSER_TOKEN

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

// known CVEs in dependencies4 high1 low

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

highplaywright@1.49.0GHSA-7mvr-c777-76hp

Playwright downloads and installs browsers without verifying the authenticity of the SSL certificate

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

lowesbuild@0.24.0GHSA-67mh-4wv8-2f99

esbuild enables any website to send any requests to the development server and read the response

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.

configLOCAL_BROWSER_ALLOWED_HOSTS— "": "localhost,127.0.0.1"

configLOCAL_BROWSER_ALLOW_ALL— false true allows any http/https host (see Security)

configLOCAL_BROWSER_ENGINE— chromium chromium (recommended) \ firefox \ webkit

configLOCAL_BROWSER_HTTP_HOST— 127.0.0.1 HTTP bind address; use 0.0.0.0 for a directly-hosted box

configLOCAL_BROWSER_HTTP_PORT— If set, run in HTTP mode on this port (else stdio)

configLOCAL_BROWSER_SKIP_BROWSER_DOWNLOAD— 1 to skip the Chromium download on install

🔐 secretLOCAL_BROWSER_TOKEN— If set, HTTP requests need Authorization: Bearer <token>

configPLAYWRIGHT_SKIP_BROWSER_DOWNLOAD

// 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 8 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/nolanlt-local-browser-mcp-1eqyjb)](https://m8ven.ai/mcp/nolanlt-local-browser-mcp-1eqyjb)

commit: cedd17b2afed00513755764cfc10af041f556c99

code hash: c198451fa24a231ac4dacc4b27ba0c8d17213740fc9facb3f14fadd3342b395b

verified: 6/18/2026, 10:29:01 AM

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