Anthropic’s Sept 2026 threat intel: Claude misuse disrupted across seven harm areas

Anthropic’s Threat Intelligence team published case studies of Claude misuse it disrupted between December 2025 and August 2026 across seven harm areas: cyber operations, influence operations, surveillance, scams and fraud, biological misuse, conventional weapons development, and illicit distillation. It says it disrupted each case, used the findings to harden safeguards, and shared intelligence with authorities and industry partners where appropriate.