Also, there are "Gen 2" chips that can have high voltage on the wipers. I've got an AD5290 that can take +/- 15V supply voltage and handle that voltage on all the supply terminals.
Problem for you is it cost 5 USD and only comes in a very hobbyist-unfriendly MSOP-10 package that is half the size of my pinky fingernail. It's nothing like the cheap Microchip digipots you can get 2 for a dollar in DIP packages.