The committee said it was investigating whether Waters used her influence to help a bank in which her husband owned stock, and whether the couple benefited as a result. Separately, the panel is looking into whether Richardson failed to disclose required information on her financial disclosure forms and received special treatment from a lender.
In the midst of a busy legislative day, ethics chairwoman Rep. Zoe Lofgren, a Democrat, a Democrat, went to the House floor to announce that a confidential weekly report of the committee from July had leaked out in a case of "cyber-hacking."
A committee statement said that its security was breached through "peer to peer file sharing software" by a junior employee who was working from home. The staff member was fired.
The July report contains a summary of the committee's work at the time, but Lofgren said no inferences should be made about anyone whose name is mentioned.
The committee typically makes a public announcement about its activities only when it begins an investigation of potential rule-breaking, which is conducted by an investigative subcommittee whose members also are made public.
However, the weekly reports include a summary of the committee's work at an earlier stage, when its members and staff scrutinize lawmakers to see whether an investigation is warranted.
The Washington Post reported in its online edition Thursday that the document was disclosed on a publicly accessible computer network and made available to the newspaper by a source familiar with such networks.
The Post reported that more than 30 lawmakers and a few staff members were under scrutiny, including nearly half the members of the House Appropriations defense subcommittee.
