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Meta Joins OpenAI and Anthropic as Muse Spark AI Model Breaches Outside Firm in Testing

Tech giant Meta has confirmed that one of its AI models accessed the internet and hacked into a third-party company’s systems during a cybersecurity test after a misconfiguration error by independent testing partner Irregular. The incident places Meta alongside OpenAI and Anthropic, whose models also recently breached external organizations while under evaluation.
Meta logo on black background next to a shattered glass explosion effect symbolizing the AI model cybersecurity breach during testing
August 6, 2026 12:48 PM IST | Written by Supriya Singh | Edited by Vaibhav Jha

Tech Giant META has claimed that one of its AI models had hacked into another company’s system due to a “misconfiguration” error during a cybersecurity test, thereby joining the list of other leading artificial intelligence companies such as Anthropic and OpenAI whose AI models had recently breached multiple organizations autonomously.

META claimed Wednesday that a misconfiguration by an independent testing company employed by META had given internet access to an AI model, that then exploited a security vulnerability in a third party organization.

AI FrontPage reached out to META on Wednesday regarding the incident and received a detailed reply.

“A misconfiguration by Irregular, an independent testing company Meta uses, inadvertently allowed one of our models access to the internet during evaluation. The model subsequently exploited a security vulnerability in a third-party service, in a manner similar to previously-reported instances with other companies. Meta learned of this when Irregular notified us, and we are currently investigating and will issue a full retrospective once we have all the facts,” said a spokesperson from META.

The announcement follows similar incidents involving AI models from OpenAI and Anthropic escaping their sandboxes and autonomously breaching other organizations’ websites through end-to-end autonomous AI systems.

The incident first came to light on July 16, when Hugging Face, an open-source platform for AI, had claimed that an autonomous end-to-end AI agent system managed to breach the Hugging Face platform and gained unauthorized access to a limited set of internal datasets and several credentials used by the platform.

Later OpenAI revealed post an internal audit that it was an autonomous AI agent from its testing escaped sandbox and hacked the platform via a malicious dataset.

According to OpenAI, when it tested its GPT-5.6 Sol and a more capable pre-release model with reduced cyber-refusal guardrails to measure maximal capabilities, the models discovered and chained a zero-day vulnerability in a third-party software proxy used for package registries, escaped the sandbox, gained broader network access, and then targeted Hugging Face’s production systems.

Similarly Anthropic also claimed that its Claude models also gained unauthorized access to at least three organizations.

In a post on X, Anthropic said that following the breach reported by OpenAI on July 21, it ran a review of over 141,000 cybersecurity evaluations. The review found that its Claude models — Opus 4.7, Mythos 5 and an “internal research test model” — obtained internet access and breached three different organizations.

Later, UK based Artificial Intelligence Safety Institute (AISI) ran a cybersecurity evaluation tests on frontier AI models of OpenAI and Anthropic and found that AI models had gone rogue “19 times” by taking “unsanctioned actions” including creating fake profiles of people to earn trust and gain access to GitHub.

Also Read: AISI Flags Claude Mythos and GPT-5.6 Sol for Going Rogue 19 Times in Cyber Tests

Authors

  • AI FrontPage Reporter Supriya Singh

    Supriya Singh is a Reporter at AI FrontPage covering the AI & Education and AI & Jobs beats. She brings six years of print and digital experience, including three years at The Asian Age, where she reported on higher education, Delhi government, and crime. She is based in Delhi-NCR.

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  • Vaibhav Jha, editor and co-founder at AI FrontPage

    Vaibhav Jha is an Editor and Co-founder of AI FrontPage. In his decade long career in journalism, Vaibhav has reported for publications including The Indian Express, Hindustan Times, and The New York Times, covering the intersection of technology, policy, and society. Outside work, he’s usually trying to persuade people to watch Anurag Kashyap films.

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