Why did an OpenAI system hack Australia’s health system – and can it be stopped in the future?
Henry Moore, Liv McMahon and Chris Vallance
Thu, September 24, 2026 at 7:31 a.m. PDT
5 min read
An OpenAI agent has gone “rogue” and “infiltrated” an Australian government website in what cyber-security experts are calling the first hack of its kind.
But why did it take the government months to discover what happened – and could it happen again?
What was hacked and why did it take Australia so long to realise?
The hack was carried out by an AI agent – an autonomous computer program that uses AI to complete a task with minimal human oversight.
On 18 June one of OpenAI’s agents went rogue during a test exercise – the company has said it was supposed to “look up answers, and available statistics for questions about Australia during an internal evaluation”.
In the process it “infiltrated” a private statistics portal containing “non-sensitive” data from Australia’s universal healthcare scheme Medicare, Prime Minister Anthony Albanese said.
OpenAI said it only realised the breach had happened at all in August while reviewing “misaligned model activity”, and the company sent an email to a generic Australian government inbox some weeks later.
That email seems to have gone unnoticed for five days before it was escalated to Australia’s cyber-security experts on 10 September.
The prime minister described the breach as “obviously unacceptable” and said OpenAI took “way too long” to inform Australian officials.
Analysts have also raised concerns over OpenAI’s almost three-month delay in noticing and reporting the breach via email.
“The way the notice arrived bothers me as much as the delay,” chief data and AI officer Simon Liu from cyber-security firm TrustDecision told the BBC.
OpenAI is the company behind the popular ChatGPT servie [Getty Images]
Are these hacks already happening elsewhere?
Australia has said this incident is the first of its kind, and experts agree it might be.
