Here this is a simple example of generating report using query object by "cfreport" tag and report template.
http://coldfusion-tip.blogspot.com/2013/11/using-coldfusion-report-tem plate-to.html
If you want to use a CSV data in report template then I think you need to convert CSV into Query object then follow the process descriobed in the above URL.
For CSV to Query coversion, you may refrer following links or you can write your own functon:
http://cflib.org/udf/CSVToQuery
http://www.bennadel.com/blog/501-Parsing-CSV-Values-In-To-A-ColdFusion -Query.htm
For more knowledge about ColdFusion reporting please refer following links: