nornir-mcp-server

The codebase includes several positive security features such as input validation with Pydantic models, configurable command blacklisting (`CommandValidator`) to prevent dangerous CLI commands, path traversal prevention for backup directories, and sensitive data sanitization in resource outputs (`_sanitize_dict`). However, a critical security risk lies in the provided example configuration files (`examples/conf/hosts.yaml`, `examples/conf/groups.yaml`, `examples/conf/defaults.yaml`) which contain hardcoded usernames and passwords (e.g., 'cisco', 'admin', 'secure_password'). The quick start guide encourages copying these examples, potentially leading users to deploy the server with insecure, plain-text credentials in a production environment. While `exec` is used in `resources.py` for dynamic function wrapping, its usage appears contained and controlled, injecting only trusted functions and parameters.