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AI Safety & AlignmentLessWrong AIPublished: Sep 18, 2026, 16:00 JST

Hacktron trio breach OpenAI monorepo using Claude Opus 5

Hacktron trio breach OpenAI monorepo using Claude Opus 5

Three whitehat hackers from Hacktron used Claude Opus 5 within hours of release to chain exploits and hack into OpenAI's monorepo codebase.

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