Researchers used Anthropic's Claude to hack OpenAI systems in under 72 hours
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Three Hacktron researchers say Anthropic's Claude Opus 5 helped them breach OpenAI via its community forum in under 72 hours. They chained a libheif HEIC image flaw with an OAuth-style “Sign in with OpenAI” weakness to reach employee ChatGPT/Codex accounts and OpenAI’s GitHub monorepo, proving access with a harmless pull request while claiming no sensitive data was viewed.
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