According to CNN reporter Evan Perez, authorities are now claiming there is a second leaker exposing classified secrets on the government surveillance programs. There has been speculation of a second leaker for a while now, especially from Glenn Greenwald's new outlet, The Intercept.
But, there have been two new stories posted recently that cited unnamed sources, meaning the information given and reported on wasn't coming from Snowden. One of which was from August 2013, months after Snowden had downloaded his documents when he was working with Booz Allen Hamilton in Hawaii, before giving them to Greenwald when he left the country for Hong Kong, before finding solace (in a way) in Russia.
Greenwald said back in July that it "seems clear at this point" that there was a second leaker. We don't know who this second leaker is, but I'm sure after everything Snowden has gone through, he or she won't be unveiling themselves to the world anytime soon.