If you are doing an exhibition, you may need to include a current CV for your artist (if contemporary) or create one for an older artist. How?
Living or recently deceased artists: search Google to see if you can find the artist's website easily. Sometimes you can.
Often you cannot:
If you can't find this information using Google, go to Artnet, a free directory of artists and galleries. Search for your artist to see works for sale at galleries. Google the gallery selling the artist's work to find a CV for the artist, or contact that gallery to obtain it.