OK, Well, There Are Even More AI Agent Hacking Incidents
AISI tests those models in “cyber ranges,” a simulated network in which AI agents are tasked with solving cybersecurity challenges. In a recent bout of testing, models from both Anthropic and OpenAI took “autonomous, unsanctioned action on the live internet” a total of 19 times over 122 training runs.The institute attributed 17 unsanctioned actions to Anthropic’s Mythos 5 model and two to OpenAI’s GPT-5.6-Sol. In what the institute described as “the most serious case,” an AI agent attempted to insert malicious code into an open-source project on GitHub.
- ▪AISI tests those models in “cyber ranges,” a simulated network in which AI agents are tasked with solving cybersecurity challenges.
- ▪In a recent bout of testing, models from both Anthropic and OpenAI took “autonomous, unsanctioned action on the live internet” a total of 19 times over 122 training runs.The institute attributed 17 unsanctioned actions to Anthropic’s Mythos
- ▪In what the institute described as “the most serious case,” an AI agent attempted to insert malicious code into an open-source project on GitHub.
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Paresh DaveBrian BarrettBusinessAug 4, 2026 7:11 PMOK, Well, There Are Even More AI Agent Hacking IncidentsRogue AI agents from OpenAI and Anthropic have again been caught trying to disrupt servers and software—and leaving instructions for future bad behavior.Photo-Illustration: WIRED Staff; Getty ImagesCommentLoaderSave StorySave this storyCommentLoaderSave StorySave this storyIt’s officially getting hard to keep track of all the times and ways AI models from OpenAI and Anthropic have been involved in “security incidents,” going outside the confines of their testing and interacting with the wider internet in unintended, often unwelcome ways.
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