OpenAI has revealed a cyber-attack carried out by rogue ChatGPT agents went further than just one company.

Hugging Face was thought to be the only victim of the unprecedented hack - but OpenAI now admits its bot attacked several "publicly-available services".

The out-of-control AI found four logins online which allowed it to access four separate, unnamed services.

Meanwhile, in an emergency briefing with hundreds of cyber security professionals, Hugging Face has described what it was like to be on the receiving end of the world's first fully autonomous AI hack.

The firm described how the AI worked at superhuman speed but also made strange decisions and mistakes that no human hacker would have made.

Hugging Face, which is like an app store for AI tools, said the hacking agents worked relentlessly with thousands of different methods trialled simultaneously.

The company first revealed that it had been hacked, external by someone using powerful autonomous AI on 16 July and reported it to police.

Nearly a week later, OpenAI admitted it was its AI that had escaped a closed environment and attacked Hugging Face on its own during a test.

It was trying to find the answers to a hacking exam it had been set by OpenAI, and targeted Hugging Face.

On Wednesday OpenAI updated its statement to include the extra detail that the hack went further than first thought.

"The models identified and used publicly exposed credentials at the account-level on other publicly-available services. This includes four accounts on four services as part of the Hugging Face incident," the company said.

OpenAI did not respond to a request for clarity on whether "publicly-available services" means companies.