An MCP server that lets an LLM build, inspect and drive a running BrowserCard deck live in the browser.
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Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
When Vitest UI server is listening, arbitrary file can be read and executed
Vitest allows Remote Code Execution when accessing a malicious website while Vitest API server is listening
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse
Anthropic's MCP TypeScript SDK has a ReDoS vulnerability
Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default
process.env. You'll be asked to provide them before it can run.BC_ACCESS_TOKEN— yes — shared secret; must match the token configured in BrowserCard. The process exits immediately if it is unset.BC_BROKER_PORT— no 3457 WebSocket port BrowserCard connects to (/bc)BC_MCP_HOST— no 127.0.0.1 interface the MCP HTTP server binds toBC_MCP_PORT— no 3456 port the MCP client connects to (/mcp)[](https://m8ven.ai/mcp/rozek-browsercard-ai-broker-1gj27o)