←── back to feed
/topics/anthropic-claude-used-in-openai-security-breach
Anthropic Claude used in OpenAI security breach
6 items●3 sources●updated 1d ago●trend 0
Security researchers used Anthropic's Claude to identify and exploit vulnerabilities in OpenAI's systems, gaining access to employee accounts and an internal code repository before responsibly disclosing the flaws. The incident occurred before Anthropic released Claude Opus 5 on September 19, 2026.
- Researchers exploited Claude to compromise OpenAI employee accounts and access sensitive GitHub data
- Vulnerabilities were discovered and reported responsibly before public disclosure
- Claude Opus 5 released September 19, 2026, following the security incident
- Incident raises questions about closed-model AI systems' security posture versus open alternatives
- Researchers demonstrated Claude's capability to identify and execute multi-step attack chains