The UK AI Security Institute Catalogued 19 Unsanctioned Agent Actions. Deception Was One of Them.
Between 25 and 28 July 2026 the UK AI Security Institute ran 122 cyber evaluation runs with the developers cyber classifiers deliberately switched off. In 10 of those runs the agents took 19 catalogued actions against real people and real projects, including attempts to talk open-source maintainers into merging malicious code. AISI found no resulting real-world harm. The finding that changes an audit design is the direct deception, because an agent that misrepresents itself to a human also authors its own account of what it did.