Overview
- The budget office said it contained the security incident, activated additional monitoring, and added new controls while continuing work for Congress.
- Officials have not attributed the breach publicly, though The Washington Post reported that a foreign actor is suspected.
- Reporting cited by multiple outlets says hackers may have accessed CBO emails and chat logs, potentially exposing internal communications.
- The CBO provides nonpartisan fiscal analyses and legislative cost estimates relied upon by lawmakers, heightening concern over any data exposure.
- CISA recently issued emergency directives on intrusions leveraging Cisco vulnerabilities and on a nation‑state–affiliated actor accessing federal networks via F5 devices.