FOIA Document on Breach of Sensitive DHS Domestic Intelligence Sharing Portal

A 2024 internal oversight report from the Office of Intelligence and Analysis of the U.S. Department of Homeland Security shows a two-months-long data breach in an intelligence sharing hub that compromised sensitive information from the FBI, the National Counterterrorism Center, state and local intelligence agencies, and other law enforcement. The breach spanned March to May 2023 and occurred after a programming error that left the intelligence portal open to tens of thousands of users who lacked proper access.

Hundreds of DHS intelligence documents, some related to sensitive U.S. activities, were accessed, though the report included no assessment of impact on the many other agencies that trust the hub to share their information, and among accounts with access during the breach period were some belonging to foreign governments. The Brennan Center obtained this report via a Freedom of Information Act request to DHS, according to the Brennan Center.