OpenAI ‘ethically hacked’ with help of Anthropic’s Claude chatbot

A team at a US-based cybersecurity startup compromised multiple OpenAI employees' ChatGPT accounts, using Anthropic's Claude chatbot to help carry out the hack, according to The Guardian. The researchers said the "scope of what we could theoretically access was huge," gaining access to their target's software cache and potentially more. The incident is the latest in a series of security issues at OpenAI.

OpenAI ‘ethically hacked’ with help of Anthropic’s Claude chatbot The Guardian Technology https://www.theguardian.com/us/technology US cybersecurity researchers who conducted hack say ‘scope of what we could theoretically access was huge’ Cybersecurity researchers have hacked into OpenAI https://www.machinebrief.com/glossary/openai with the help of Anthropic https://www.machinebrief.com/glossary/anthropic ’s Claude https://www.machinebrief.com/glossary/claude chatbot https://www.machinebrief.com/glossary/chatbot , in the latest example of security issues https://www.theguardian.com/technology/2026/aug/26/openai-staff-observed-warning-signs-before-ai-agent-hacking-crusade-caused-global-alarm at the company. A team at a US-based startup compromised multiple OpenAI employees’ ChatGPT https://www.machinebrief.com/compare/chatgpt-vs-claude accounts, starting a process that enabled them to access their target’s software cache – and potentially more. Continue reading... https://www.theguardian.com/technology/2026/sep/18/openai-hacked-anthropic-claude-chatbot Get AI news in your inbox Daily digest of what matters in AI. Key Terms Explained Anthropic https://www.machinebrief.com/glossary/anthropic An AI safety company founded in 2021 by former OpenAI researchers, including Dario and Daniela Amodei. Chatbot https://www.machinebrief.com/glossary/chatbot An AI system designed to have conversations with humans through text or voice. Claude https://www.machinebrief.com/glossary/claude Anthropic's family of AI assistants, including Claude Haiku, Sonnet, and Opus. OpenAI https://www.machinebrief.com/glossary/openai The AI company behind ChatGPT, GPT-4, DALL-E, and Whisper.