The full title is Committee of Sponsoring Organizations of the Treadway Commission (2004) Enterprise Risk Management—Integrated Framework.
The Executive Summary is available free online. The full Integrated Framework can be downloaded for a fee. A new edition is in development.
A more useful statement on risk appetite was issued by COSO in 2012.
COSO became an authority based on their Internal Control—Integrated Framework (1992), which was updated in 2013.