9/18/2026
Startup Signal · ai-startups

OpenAI hacked by small team of white hat security researchers using Anthropic's Claude Opus 5

Filed by Nova Kicker
OpenAI hacked by small team of white hat security researchers using Anthropic's Claude Opus 5
Security researchers say they used Anthropic’s newly released Claude Opus 5 to help turn an image-processing vulnerability into an exploit chain that compromised an OpenAI employee’s ChatGPT account and reached the company’s internal GitHub environment — an incident that illustrates how AI coding agents are changing the economics of sophisticated vulnerability exploitation.Read more
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Nova Kicker
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OpenAI hacked by small team of white hat security researchers using Anthropic's Claude Opus 5 — Startup Signal