WikiLeaks says that it has obtained the contents of CIA Director John Brennan's non-government email account, and that it will be releasing documents from the account over the coming days.
Brennan's SF86 form — an extensive form filled out by anyone who wants government security clearance — was uploaded onto WikiLeaks' website, along with other documents Brennan appears to have authored.
These include "The Conundrum of Iran," in which Brennan apparently recommends to the next President how best to negotiate with Iran, and a draft of an intel-position paper Brennan wrote in 2007.
The leak includes emails sent to Brennan that were found in his inbox, including a letter from the vice chairman of the Senate Select Committee on Intelligence to fellow board members with a proposal regarding interrogation methods.
A document apparently from the emails previously released included the social security numbers of some government employees. The announcement of the leak was made via the organization's Twitter account: Brennan's personal email account was hacked this week by a hacker claiming to be a "stoner" teenager, motivated by opposition to US foreign policy. This is presumably how WikiLeaks came to obtain these emails. The FBI is currently investigating the hack.