DHS order removing DeepSeek from US federal civilian systems made public
The US Department of Homeland Security made public on 19-20 October 2026, through a Federal Register notice, Exclusion and Removal Order 2026-01, signed by Homeland Security Secretary Markwayne Mullin and dated 24 July 2026. The order requires federal civilian agencies to remove all DeepSeek and DeepSeek-affiliate products from their information technology systems, together with any third-party products or services developed using DeepSeek implementations, and bars further procurement from the company or its affiliates. It was issued under supply-chain authority created in 2018 and had been kept from public view for nearly three months. The Department of Defense had separately issued its own exclusion and removal order for DeepSeek technologies on 8 September 2026, as required by the fiscal 2026 National Defense Authorization Act. China's foreign ministry objected, saying it opposes the over-generalisation of national security in science and trade.
Why It Mattered
This is the first government-wide removal order aimed at a foreign artificial intelligence developer by the United States, and the first to reach beyond a vendor's own products to anything built on its models. The breadth is the point: because DeepSeek's weights are openly published and widely fine-tuned, a prohibition on third-party products and services developed using DeepSeek implementations extends to software whose provenance is often undocumented, and compliance officers have no reliable way to audit a model lineage after distillation or fine-tuning. Security practitioners criticised the order as vague for exactly that reason. The action converts open weights from a commercial question into a procurement and national-security one. Open release had been treated mainly as a competitive strategy; after this order, the government's position is that downstream derivatives inherit the risk profile of their origin, which implies some future requirement for model provenance tracking that does not yet technically exist. It also closes a symmetry. In the same week, Beijing's first export registrations were granted for Chinese models to be open-sourced and licensed abroad. One government moved to restrict what its agencies may run; the other moved to control what its companies may export. Together they mark the point at which model weights were treated by both capitals as items subject to state control rather than as published research. The delayed disclosure — an order signed in July and revealed in October — is itself notable, indicating that restrictions on AI systems were being imposed without public notice.
Who Built It
US Department of Homeland Security
Applications
- Government Procurement
- National Security
- Open-Weight Models