The Social Security Administration’s chief data officer, Charles Borges, has filed a whistle-blower complaint alleging that members of the Department of Government Efficiency uploaded the agency’s master “Numident” file—containing every Social Security number ever issued—to an inadequately secured cloud server in June. The data set holds names, addresses and birth dates for roughly 300 million people, making it one of the federal government’s most sensitive repositories. Borges told the Office of Special Counsel and key congressional committees that the move bypassed standard security protocols and left “enormous vulnerabilities,” including the risk of mass identity theft and the potential need to reissue Social Security numbers at substantial cost. An internal security assessment cited in the complaint warned of “catastrophic impact” if the file were compromised, while a July memo from Social Security chief information officer Aram Moghaddassi said he “accepted all risks” to meet DOGE’s project timeline. DOGE, a cost-cutting unit created by Elon Musk and embedded across federal agencies, won Supreme Court approval earlier this year to access Social Security data after a lower-court halt. The White House and SSA declined to comment on the new allegations. Borges said no breach has been detected but stressed that, as of late June, independent monitoring of the server was still absent.