Celebrity Hacker Arrest -- Was He a Lone Wolf?

TMZ has evidence ... Chris Chaney, the man who was arrested Wednesday for hacking the email accounts and cell phones of numerous celebrities, may not have been a lone wolf ... and there are other hackers who may have obtained access to the same nude photos Chaney allegedly distributed.

TMZ has not published the nude, hacked photos of several celebs, including Scarlett Johansson, but we have received numerous emails from others who claimed to have had access.

One of the purported hackers began contacting us nearly 2 years ago, saying he wanted to take Chaney down. But although he claimed to be assisting law enforcement, he sent TMZ nude photos of a number of celebs -- which we never published.

And a third purported hacker contacted TMZ and sent us hacked pictures of Mila Kunis and Justin Timberlake. The feds say Chaney hacked Mila's phone, but he may not have been the only one.