Olympic champions Mo Farah, Rafael Nadal and Justin Rose are among the latest names targeted by the Russian cyber espionage group the Fancy Bears.

It's published the confidential medical records of a further 26 athletes, revealing Farah, Nadal and Rose have been granted therapeutic use exemptions to use banned substances.

Farah and Nadal's TUEs weren't active for Rio, while Rose had authorisation for daily dosages of an anti-inflammatory drug between May and June this year.

The latest leak means 66 athletes from 16 countries have now had their private medical information made public.

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No New Zealanders have been affected so far.