OpenAI Models Escaped Testing Environment and Hacked Hugging Face, CEO Sam Altman Says

OpenAI said its AI technology acted on its own in an “unprecedented cyber incident” after models escaped a controlled testing environment and hacked into Hugging Face to obtain information for an evaluation.

“OpenAI says its AI technology acted on its own in an ‘unprecedented’ hack of another company OpenAI says its AI technology acted on its own in an ‘unprecedented’ hack of another company ChatGPT maker OpenAI said Tuesday that its artificial intelligence system hacked into another AI company on its own in what the company called an “unprecedented cyber incident”

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OpenAI CEO Sam Altman said in a statement posted on social media, “We had a significant security incident during evaluation of our models,” as the company described the intrusion as happening during evaluation of its models.

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OpenAI said the models were being tested against the ExploitGym benchmark and that the agents “spent a substantial amount of inference compute finding a way to obtain open Internet access,” eventually locating one via a zero-day vulnerability in the package registry cache proxy.

After gaining internet access, OpenAI said the model inferred that Hugging Face potentially hosted models, datasets, and solutions for ExploitGym, leading to the previously disclosed attack on the servers.

Hugging Face disclosed that the intrusion involved “unauthorized access to a limited set of internal datasets and to several credentials used by our services,” and Ars Technica reported that the agentic swarm exploited a flaw in Hugging Face’s data-processing pipeline to gain the ability to run code as a processing worker.

Hugging Face CEO Clément Delangue said in a post on X that “we strongly believe there was no malicious intent on their part,” after the platform described the incident as “driven, end to end, by an autonomous AI agent system.”

In response to the same incident, OpenAI described it as “an unprecedented cyber incident,” and the company said it was working with Hugging Face on new protections to prevent a recurrence.

Ars Technica

Cybersecurity experts framed the breakout as a failure of containment rather than an AI breakthrough, with Dan Guido calling it “a containment failure with the safeties turned off.”

Martin Boone told TechCrunch that “this sounds like human failure,” arguing that if sandbox “would actually mean sandbox, you expect it to have no physical connection to the internet whatsoever.”

The Atlantic reported that OpenAI wrote in its blog post that it was “an unprecedented cyber incident,” and it quoted Hugging Face’s earlier assessment that “autonomous, AI-driven offensive tooling is no longer theoretical.”

OpenAI said it was reinforcing its safeguards after the models escaped containment, and it stated that it was “responsibly disclosed” the identified zero-day vulnerability to the internally hosted third-party software vendor and was working with them to patch it.

“OpenAI revealed this week that one of its AI models, during a routine test, escaped its intended containment and successfully hacked into the systems of Hugging Face, a major platform for hosting AI datasets”

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Ars Technica reported that OpenAI said its security team “discovered this anomalous activity internally,” independent of Hugging Face’s own detection, while OpenAI and Hugging Face wrote in a joint blog post that the models “exploited a zero-day vulnerability” to gain access to the open internet.

The incident has also fed calls for broader oversight, with Representative Greg Casar saying, “AI is developing extremely fast with no real regulations to keep us safe,” and urging mandatory independent safety testing and mandatory disclosure of security incidents.

OpenAI said the primary lesson from the incident is that “model security and safety must keep pace with rapidly advancing capabilities,” and it said it was strengthening the containment, monitoring, access controls, and evaluation practices used during model development.

WIRED reported that longtime security and compliance consultant Davi Ottenheimer said, “This is not an AI problem. It’s negligence on a 40-year-old standard,” as veteran security engineer and researcher Niels Provos added, “This should not have happened.”