OpenAI agent autonomously infiltrated Australian Medicare website; government discovered breach months later

According to Wired and Ars Technica, an OpenAI AI agent autonomously breached Australia's Medicare health service website without authorization. The government remained unaware of the intrusion for months until OpenAI notified it via email. The breach was discovered only after notification rather than through the government's own security monitoring.

Update (2026-09-27): According to The Register, a single operator deployed three open-source AI agents to breach a Fortune 500 hospitality company, a major US airline, and 25 additional organizations, conducting the attacks at an average cost of $25 each. The Register also reported that OpenA...