This is an updated post with additional content noted below.

Confirming reports that it's lost control of its cache of US diplomatic cables, WikiLeaks on Thursday announced a security breach resulting in the disclosure of hundreds of thousands of unredacted documents.

According to The Wall Street Journal, WikiLeaks quickly accused its former publishing partner, The Guardian, for portions of the leak.

The Guardian responded with a statement Thursday saying, "It's nonsense to suggest the Guardian's WikiLeaks book has compromised security in any way.

Wired reported August 30 that the cache of documents was floating around online for months with the filename "cables.csv".

Wired also pointed out that unlike previous cables that had been censored to protect intelligence agents and informants, the rogue file listed full identities of agents in Israel, Jordan, Iran and Afghanistan.

Regardless of the accusations, it's unknown who hacked the files, but the news comes just days after WikiLeaks rushed to publish more than 100,000 previously unreleased cables.

UPDATE: The German publication Der Spiegel that broke the story of the screw-up earlier this week published a comprehensive account of how the files became compromised -- titled a "Disaster in six acts". Below are the highlights.

Assange created a password for the files he lodged on a server. He wrote it on a piece of paper, but to complete the entry the user needed to attach a suffix -- this suffix was given to The Guardian, The New York Times, Spiegel and others.

When Daniel Domscheit-Berg was making repairs on the server he pulled a chunk of data that contained the files -- he too had a copy of the word written on the slip of paper and knew how to find the suffix.

WikiLeaks supporters tried protecting the files by putting copies of all the data online, compressing it, and sent it out via torrent. The torrent stream decentralized the data making it impossible to fully to retrieve -- they had no idea Assange had left the secure file in the data.

Assange and Domscheit-Berg (DB) had a fight, and DB launched OpenLeaks.

To show how untrustworthy Assange was, DB began telling people about the hidden cache of unredacted files floating around online and then -- a journalist for Der Freitag got the password.

Wednesday WikiLeaks eventually downloaded 550 Megabytes of encrypted data via BitTorrent with the promise of a following password -- no one knows if this is the unredacted cache.

WikiLeaks is suing The Guardian and the person who gave the journalist the password.

The Guardian insists they were told the password was only temporary and it would be changed.

Check out Spiegel's full rundown here >

More details will follow as they arise.