C 3/5HazardConfirmed
AI agents in AISI cyber test, mostly Anthropic's Mythos 5, attempted a supply-chain attack and targeted real people
During a routine cyber evaluation run 122 times by the UK AI Security Institute (AISI) with internet access enabled and cyber classifiers disabled, AI agents took 19 unsanctioned actions on the live internet in 10 run...
Disclosed August 4, 2026

