100+ Tech Firms Sign Open Letter Warning of AI-Driven Cyber Attacks Within Months

OpenAI, Google, Anthropic, AWS, Microsoft, Cloudflare, CrowdStrike, and over 100 others signed an open letter on August 27, 2026, warning that AI-enabled cyber attacks will soon grow far more widespread and sophisticated. Published at openai.com/collective-cyberdefense, the letter urges collective defense but includes no enforcement mechanism or technical specification.