There’s an internal war raging inside the powerful correction officers union — with a rival asking a court to oust longtime union head Norman Seabrook from his position for being a paranoid, vindictive bully.

Union Secretary William Valentin, a 22-year veteran of the Department of Correction, said Seabrook went so far as to get Valentin’s girlfriend fired from her Correction gig as payback for challenging his authority.

In a Manhattan Supreme Court lawsuit filed Wednesday, Valentin says he was illegally booted from his position in the 9,000-member union earlier this month for trying to get a copy of the member mailing list.

When Seabrook learned that Valentin had asked the union’s controller to put the mailing list on a zip drive after Seabrook had blocked access to the directory, he told Valentin he wasn’t being a team player, then booted him from the board, according to the lawsuit.

Although union bylaws require the secretary to “maintain an up-to-date mailing list of all members,” Seabrook feared if Valentin accessed the directory, he might “undermine his perpetual re-election as president,” the suit says.

“Seabrook is completely paranoid,” Valentin’s lawyer, Harvey Levine, said.

Seabrook did not return calls for comment.