Codesake::Dawn is a security source code scanner for ruby powered code. It is especially designed for web applications, but it works also with general purpose ruby scripts. Codesake::Dawn supports all major MVC frameworks like ruby on rails, padrino and sinatra; it provides more than 150 security checks with their own mitigation suggestion.
Gemfile gem 'codesake-dawn', '~> 1.1.2'
install gem install codesake-dawn -v 1.1.2