If glass containing cadmium is exposed to acid, the cadmium can leach out.

This is an abstract of an article about cadmium (and other heavy metals) leaching out of glass dinnerware.
http://www.ncbi.nlm.nih.gov/pubmed/18472562
Heavy metals like lead and cadmium were found to leach out from food contact surface of opal glass dinnerware when treated with five food acids as a leaching solution. The leachates used were: acetic acid, tartaric acid, citric acid, lactic acid and ascorbic acid at three different concentrations 2%, 4%, and 8% (v/v). At room temperature, duration of leaching varied from 1h to 24h in each case. The amount of metals leached in individual acid was found to be maximum at the 4% acid concentration. Release of Pb and Cd was faster in first 2h leaching period. Maximum amount of Pb and Cd were leached in 4% acetic acid at room temperature.

The acids in the study were only food-grade acids (acetic acid, tartaric acid, citric acid, lactic acid, and ascorbic acid) and were used to show what leached out when the glass was in contact with food.

The dinnerware was most likely soft glass. So, if you are working with soft glass, then keep that in mind.

Clear borosilcate is more impervious to acid than soft glass, but I don't know about colored borosilicate and if the cadmium would leach out when exposed to acids that normally don't affect boro. Boro is not, however, resistent to hydrofluoric acid or hot phosphoric acid. Phosphoric acid (E338 - orthophosphoric acid) is used in some colas to add that tangy zip.

So, to be super safe, I would not drink any hot cola (yuck) out of a goblet made with cadmium color.

Ironically, phosphoric acid found in colas can hurt your bones and kidneys - which is also the big concern about cadmium. So, it doesn't matter what your drinkware is made of, you're screwed if you drink a lot of sodas, anyway. Cadmium is probably a lot worse for you, though, since it is a heavy metal.