Bradlee, now a Post vice president-at-large, is quoted by Vanity Fair as saying the "likely source" who revealed Valerie Plame's identity to Washington Post reporter Bob Woodwards is former Deputy Secretary of State Richard Armitage.
However, Bradlee told the Post he didn't "think I said it," when talking to Vanity Fair. "I know who the source is and I don't want to get into it. ... I have not told a soul who it is," Bradlee told the Post.
Vanity Fair said Marie Brenner, who wrote about the Plame affair for the magazine, was not available for comment. Armitage also did not comment to the Post on the report.
White House detractors claim Plame's name was leaked in retaliation for a report by her husband discounting Bush administration claims that Iraqi leader Saddam Hussein was trying to obtain nuclear materials.
An independent prosecutor has looked into the leak and indicted Lewis Libby, a former aide to Vice President Dick Cheney, for perjury and other charges.