Yes, it is possible. You just need to publish your CSV has a hosted table.
Go to your Content and click 'New Item'.
Browse to your CSV and select it. When asked to select your location settings, click the dropdown and select 'none- add as a hosted table'.
Once your table has been published, open up a new dashboard.
When you add a dashboard element, it will ask you to select a data layer, simply choose the hosted table you just created.
- Jen