Congressional Budget Office says it was hacked in a security incident

Officials reportedly told the Washington Post that they believe a foreign actor could be behind the attack, which risks insight into lawmakers’ communications with CBO staff. The hackers may have accessed emails along with chatlogs.

Published: November 6, 2025 5:42pm

The nonpartisan Congressional Budget Office (CBO) on Thursday confirmed that it was hacked in a "security incident" and that it has taken actions to contain the fallout.

Officials reportedly told the Washington Post that they believe a foreign actor could be behind the attack, which risks insight into lawmakers’ communications with CBO staff. The hackers may have accessed emails along with chatlogs.

“The Congressional Budget Office 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,” CBO spokesperson Caitlin Emma told The Hill. “The incident is being investigated and work for Congress continues. 

"Like other government agencies and private sector entities, CBO occasionally faces threats to its network and continually monitors to address those threats," she added.

It was not immediately clear when the hack took place, but it comes after the Cybersecurity and Infrastructure Security Agency told reporters in September that at least one government agency had been hacked.

Misty Severi is a news reporter for Just The News. You can follow her on X for more coverage. 

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