WASHINGTON — The Congressional Budget Office on Thursday confirmed it had been hacked, potentially disclosing important government data to malicious actors.

The small government office, with some 275 employees, provides objective, impartial analysis to support lawmakers during the budget process. It is required to produce a cost estimate for nearly every bill approved by a House or Senate committee and will weigh in earlier when asked to do so by lawmakers.

Caitlin Emma, a spokeswoman for the CBO said in a written statement that the agency “has identified the security incident, has taken immediate action to contain it, and has implemented additional monitoring and new security controls to further protect the agency’s systems going forward.”

The Washington Post first wrote the story on t

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