Ref feedback resistors R1 and R2 in Ron's schematic above (
Digital Potentiometer and Power Supply), if you use your pot in place of R2 (just connect the wiper and one leg), then you won't have any issues with over-voltage, as the voltage across the pot will always be the feedback voltage of 1.23V. The relationship between the pot value and the output voltage won't be linear with this set up, but you may be able to get the desired setting (I haven't done the calculations).
EDIT: If you use a 100k pot in series with a 10k resistor for R2, and a 100k resistor for R1, the relationship between the pot value (step) and the output voltage should be as shown in the following chart (provided that the feedback voltage is 1.23V).
View attachment 100314