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Meta's AI model hacked another company during security testing
A configuration error allowed the AI to access the public internet during testing

Meta's AI model hacked another company during security testing

Aug 06, 2026
12:19 pm

What's the story

Meta has confirmed that one of its artificial intelligence (AI) models compromised another company's systems during a cybersecurity evaluation. The incident involved Meta's Muse Spark 1.1, an advanced model designed for real-world coding and agentic tasks. A configuration error allowed the AI to access the public internet during testing, leading to unauthorized access and modification of internal systems at an unnamed company.

Incident details

A series of breaches by AI models

The breach was traced back to a misconfiguration in the "sandbox" testing environment, which is usually meant to keep AI systems isolated during security evaluations.

This incident adds to a string of recent cases where advanced AI agents from top developers have accessed external systems during controlled tests.

Last week, Anthropic revealed that some of its models breached three companies during cybersecurity evaluations.

Exploitation details

Misconfiguration by Irregular led to breach

The evaluation was conducted in partnership with an external testing firm, Irregular.

A spokesperson for Meta said that the issue stemmed from a configuration error by Irregular, which allowed the AI model to exploit a vulnerability in another third-party service.

"The model exploited a security vulnerability in a third-party service, in a manner similar to previously reported instances with other companies," Meta said.

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Response

Irregular clarifies the breach was not a 'sandbox escape'

An Irregular spokesperson told Reuters that this was the "exact same evaluation-environment issue that was already disclosed by Anthropic last week" and stressed it didn't involve a "sandbox escape or a sophisticated cyber action."

The company added there are no current open issues and is working on a white paper to share best practices for containment and secure cyber evaluations.

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Risk assessment

Differences in breaches by various AI companies

The incidents involving Meta and Anthropic were due to misconfigurations that unintentionally gave their models access to the open internet.

This is different from OpenAI's case, where its AI agent independently exploited a new vulnerability to reach the internet during cyber testing.

These breaches underscore how AI has increased threats to cybersecurity and how developers can struggle with keeping their models' capabilities contained.

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