Assuming you plan to connect your CV to the pedal input, 5V may not necessarily break it (there is some protection), but it anything over 3.3V will be treated as 100%. A couple of resistors to reduce the 5V to 3.3V would be a good thing.
If you are worried about the MIDI 127 step limit (usually enough for most things), you may want to use a controller that generates MIDI double (16383 steps). But, don't ask me which ones do this.
Latest versions of TF, MF and PF support MIDI double.