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Cybersecurity Breach: Hackers Exploit Claude AI to Access OpenAI Systems

First seen 19 Sep 2026, 05:54 UTC • •
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ThreatCluster •September 19, 2026 at 07:22 UTC
  • •Hackers exploited Claude Opus 5 to breach OpenAI systems.
  • •A cybersecurity startup earned a $6,500 bug bounty for the hack.
  • •The incident raises concerns about the security of AI technologies.

On September 18, 2026, hackers utilized Claude Opus 5, an AI tool, to breach OpenAI systems. The attack was executed by a cybersecurity startup that reportedly earned a $6,500 bug bounty for their efforts. The breach raises significant concerns about the security of AI systems and their vulnerabilities. While specific details about the exploited vulnerabilities were not disclosed, the incident highlights the potential for AI tools to be weaponized against major tech companies. OpenAI has not publicly confirmed the extent of the breach or the specific systems affected. The attack underscores the growing trend of using advanced AI for malicious purposes in cybersecurity. The current status of the breach remains unclear, with further investigations likely ongoing.

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Timeline

2026-09-18
Hackers breach OpenAI systems
Using Claude Opus 5, hackers accessed OpenAI systems and earned a bug bounty.
Hackread
2026-09-18
Security articles published
Security Boulevard and Hackread published articles detailing the breach and its implications.
Securityboulevard

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