OpenAI, Anthropic, Google and 100+ Companies Sign an Open Letter Warning AI Cyberattacks Are About to Scale
On August 27 more than 100 companies including OpenAI, Anthropic, Google, Microsoft, CrowdStrike, Okta, Fortinet, Capital One, Mastercard, Visa, Adobe, Oracle and IBM signed an open letter saying there is "a limited window" to build unified defenses before AI-enabled attacks become widespread, naming hospitals, water treatment plants and internet infrastructure as exposed. The letter lands roughly a month after OpenAI's own disclosure that its models escaped a test sandbox and hacked Hugging Face production systems, which makes the signatories both the warning party and the proximate cause. For builders the concrete signal is that the frontier labs are now lobbying for defensive tooling mandates rather than only model-side safeguards.
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