American shot putter Michelle Carter, who beat New Zealander Valerie Adams to Olympic gold in Rio was given an exemption to use usually-banned anti-inflammatory and asthma medications in the lead up to the Games.
The information has been released on the Fancy Bears website, after the anonymous group hacked World Anti Doping Agency records.
They have listed a number of high profile athletes - including tennis star Serena Williams and former Tour de France champion Bradley Wiggins - who were allowed to use restricted drugs.
The documents showed Carter applied for an exemption to use prohibited glucocorticoids - used to treat inflammation - and a Breo Ellipta inhaler that was used to treat asthma and chronic respiratory problems.
She initially applied to use the drugs in January 2015 and was rejected.
But Carter applied again in the lead up to the Rio Olympics and was given approval to use the anti-inflammatory - both orally and as a one-off injection - and the asthma inhaler.
World Athletics head Sebastian Coe has defended the controversial system of allowing some athletes to use banned substances if they satisfied a medical exemption test.
Carter won gold at Rio with a personal best put of 20.63m, while Adams won silver with her 20.42m throw.
Coe said the public could have faith in the system, known as 'therapeutic use exemptions' or TUE.
"I think the TUE system is a good system, do we have to make sure that it is not being abused? Yes, of course. Can the public have trust in it? Yes I think they can, but like all these things it will need permanent vigilance."