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● LIVE Updated 2h ago · 8 sources tracked

OpenAI breached by researchers using Anthropic models

Security researchers from Hacktron used Anthropic's Claude model to break into OpenAI's internal systems. The team exploited an image-processing flaw to gain access to employee accounts and internal code repositories, including OpenAI's GitHub environment. The breach occurred in under 72 hours, demonstrating the speed with which current AI technology can execute sophisticated cyberattacks. The researchers specifically utilized Claude Opus 5 to target the OpenAI forum and reach internal repositories.

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  • ✓ Security researchers used Anthropic's Claude to breach OpenAI's internal systems.
  • ✓ The breach provided access to OpenAI employee accounts and internal code repositories.
  • ✓ Hacktron AI researchers carried out the attack.
🛡️ Source Corroboration: 8 independent reporting domains (90% confidence) ⏱ Read time: ~2 min

What changed

Hacktron researchers confirmed they used Claude Opus 5 to exploit an image-processing flaw to access OpenAI's internal GitHub environment.

Live updates

  1. Researchers use Anthropic's Claude to breach OpenAI internal systems

    Security researchers from Hacktron used Anthropic's Claude model to break into OpenAI's internal systems. The team exploited an image-processing flaw to gain access to employee accounts and internal code repositories, including OpenAI's GitHub environment. The breach occurred in under 72 hours, demonstrating the speed with which current AI technology can execute sophisticated cyberattacks. The researchers specifically utilized Claude Opus 5 to target the OpenAI forum and reach internal repositories.

    Why it matters

    This incident highlights a growing concern regarding the use of large language models to automate and accelerate the discovery of software vulnerabilities. It pits two leading AI labs against each other, showing how one company's tool can be weaponized against another's infrastructure.

    What is confirmed

    • Security researchers used Anthropic's Claude to breach OpenAI's internal systems.
    • The breach provided access to OpenAI employee accounts and internal code repositories.
    • Hacktron AI researchers carried out the attack.

    Still unconfirmed

    • The breach was completed in under 72 hours.

    What to watch next

    • OpenAI's official response to the image-processing flaw
    • Anthropic's update to Claude's safety guardrails regarding exploit generation
    Sources used for this update (8)
    1. WSJ — Exclusive | Hackers Used Anthropic’s Claude to Break Into OpenAI
    2. Financial Times — OpenAI breached by researchers using Anthropic models
    3. The Information — Bug Hunters Used Claude to Hack OpenAI
    4. Forbes — Security Researchers Hacked Into OpenAI Using Anthropic’s Claude
    5. CyberSecurityNews — Researchers Use Claude Opus 5 to Hack OpenAI Forum and Reach Internal Repositories
    6. techxplore.com — Researchers used Claude to breach OpenAI's internal systems
    7. cryptoslate.com — Anthropic’s Claude helped 3 researchers breach OpenAI in under 72 hours
    8. coinpedia.org — OpenAI Hacked Using Anthropic’s Claude, Hackers Confirmed It
    confidence 90%
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