The acting head of the U.S. Cybersecurity and Infrastructure Security Agency uploaded sensitive government documents into a public version of ChatGPT last summer, triggering internal security alarms, according to multiple Department of Homeland Security officials. The uploads raised concerns inside DHS because the agency oversees federal cyber defense against foreign adversaries, including Russia and China. Four DHS officials said Gottumukkala uploaded contracting documents into ChatGPT during the summer. Gottumukkala later met with senior DHS officials to review what he uploaded, two officials said. “Was granted permission to use ChatGPT with DHS controls in place,” said Marci McCarthy, CISA’s director of public affairs.