Olympic gold medallists Mahe Drysdale and Peter Burling are the first New Zealand athletes to have their medical data leaked online by Russian computer hackers the Fancy Bears.

The sixth batch of stolen therapeutic use exemption (TUE) forms belong to 20 athletes from 14 different countries, which means 127 athletes have now been named by the Fancy Bears over the last three weeks.

There's no suggestion of any wrongdoing, as all the TUEs have been granted approval by anti-doping authorities.

Drysdale, who defended his rowing single sculls title in Rio, was granted four Therapeutic Use Exemptions from April 2015 to August of this year for the drug fluocortolone.

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Documents show the single sculls gold medallist was allowed to take suppositories before scheduled surgery in New Zealand.

Burling, who won gold with Blair Tuke in the men's 49 in Rio, had a TUE for the prohibited substance remifentanil for a wisdom tooth extraction in September last year. It was used once.

The leak also includes data from double Olympic triathlon champion Alistair Brownlee.

Brownlee was granted an exemption to take Diamox to treat altitude sickness after climbing Mount Kilimanjaro in 2013.

Previous athletes to have their TUE data leaked, after the World Anti Doping Agency's computer system was hacked, include Olympic champions Serena Williams, Simone Biles, Mo Farah, Rafael Nadal and Justin Rose.