The U.S. Congressional Budget Office (CBO), a nonpartisan agency that provides crucial economic and budgetary analyses to lawmakers, was targeted in a cyberattack believed to be carried out by foreign-backed hackers in November 2025. The breach potentially exposed confidential communications, including internal emails and discussions between the CBO and members of the legislature. The attack exploited vulnerabilities in the agency’s network, possibly through outdated security infrastructure, and raised concerns about the protection of sensitive government data. In response, the CBO has taken immediate steps to contain the breach and strengthen its cybersecurity measures. This incident highlights broader global challenges around safeguarding government institutions from cyber threats amid geopolitical rivalries. Despite the disruption, the CBO continues its work supporting the legislative process, emphasizing the importance of robust defenses to protect critical policy-making information worldwide.