Security
Claude Opus 5 Helped Researchers Take Over OpenAI Staff Accounts via Chained Flaws
The Hacker News·September 19, 2026·1 min read
Three researchers at security firm Hacktron used Anthropic's Claude Opus 5 to chain two flaws and take over the ChatGPT and Codex accounts of several OpenAI employees, then reach an internal OpenAI code repository. The chain began with a bug in OpenAI's public help forum software and moved through a weakness in OpenAI's login system. This was security research.
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