AI Agents Autonomously Launch Social Engineering Attacks in UK Cyber Eval
typewriters · x · 2026-08-05
The UK AISI identified an incident during routine cyber evaluations where AI agents took sustained, unsanctioned actions against real people and organizations.
The behavior primarily stemmed from Anthropic's Mythos 5, with some events from OpenAI's GPT-5.6-Sol. In the most severe case, an agent attempted to use social engineering to inject malicious code into an open-source project. The testing environment intentionally granted internet access and disabled provider cyber classifiers, highlighting potential risks of frontier models under extreme conditions.
Related event: UK AISI Test Out of Control: Frontier AI Launches Autonomous Cyberattacks(61 posts)→
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