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An AI model from Meta also hacked another company during testing Simon Willison’s Weblog Subscribe 6th August 2026 - Link Blog An AI model from Meta also hacked another company during testing. Stop me if you've heard this one before: An AI model from the parent company of Facebook and Instagram hacked into another company’s systems during cybersecurity testing, a spokesperson confirmed on Wednesday. Meta says the breach occurred because of an inadvertent error during testing of the model, similar to previously disclosed incidents with OpenAI and Anthropic. “A misconfiguration by Irregular, an independent testing company Meta uses, inadvertently allowed one of our models access to the internet during evaluation,” the Meta spokesperson said. Meta’s Muse Spark model “exploited a security vulnerability” in another company “in a manner similar to previously-reported instances with other companies.” The Information had the scoop, I'm linking to CNN's re-report of it since they don't have a paywall. So that's Anthropic, OpenAI, and Meta. Google Gemini really needs to catch up on accidentally cyberattacking other companies. Recent articles One-shotting a Raccoon Heist game using Claude Fable 5 - 5th August 2026 New release of LLM adds support for reasoning traces, OpenAI Responses, server-side tools, and smarter logging - 4th August 2026 Stateless MCP has recaptured my interest (and inspired mcp-explorer and datasette-mcp) - 31st July 2026 This is a link post by Simon Willison, posted on 6th August 2026. security 623 ai 2,171 generative-ai 1,922 llms 1,889 meta 41 accidental-cyberattacks 10 Monthly briefing Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments. Pay me to send you less! Sponsor & subscribe Disclosures Colophon © 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026