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Claude Opus 5 Helped Researchers Take Over OpenAI Staff Accounts via Chained Flaws

lowthehackernewsPublished 2026-09-19

Three researchers at the 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 the software that runs OpenAI's public help forum and moved through a weakness in OpenAI's own login system.

This was security research,

Original source: https://thehackernews.com/2026/09/claude-opus-5-helped-researchers-take.html