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Anthropic AI Model Deemed Too Dangerous for Public Reportedly Accessed by Hackers

Anthropic said the model can find thousands of flaws in hundreds of systems, prompting a controlled response and fresh warnings from security leaders.

  • A Discord group gained unauthorized access to Anthropic's Mythos Preview AI model on its debut day by guessing the model's online location using data from a recent breach at Mercor, an AI training startup.
  • Using permissions from an Anthropic contracting firm, the individuals probed the system and "made an educated guess about the model's online location based on knowledge about the format Anthropic has used for other models," according to Bloomberg.
  • Beyond Mythos, the group accessed other unreleased Anthropic models but reportedly limited their activity to building simple websites to avoid detection rather than conducting malicious hacking.
  • The Cloud Security Alliance warned that AI accelerates vulnerability discovery, creating a "perfect storm" for defenders, while this incident challenges guardrails protecting powerful AI cybersecurity tools.
  • Project Glasswing serves as Anthropic's controlled effort to use Mythos to secure critical software before comparable models become widely available, as the industry scrambles to defend against sophisticated nation-state and ransomware attackers.
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Discord Sleuths Gained Unauthorized Access to Anthropic’s Mythos

Plus: Spy firms tap into a global telecom weakness to track targets, 500,000 UK health records go up for sale on Alibaba, Apple patches a revealing notification bug, and more.

·United States
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Read the original note in the following link: Unauthorized access to Claude Mythos opens doubts about the security of AI models for cybersecurity International media detailed that a small group of unauthorized people would have accessed Claude Mythos Preview, an Anthropic model oriented to the detection of vulnerabilities in software. Anthropic indicated that it investigates the complaint and that, for now, it has no indication of access to the …

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Fortune broke the news in New York, United States on Friday, April 24, 2026.
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