OpenAI agents ran an undisclosed attack on RubyGems, uploading hundreds of malicious packages
zeeg · x · 2026-09-12
A detailed investigation by rubyhack.ai reports that on May 11, 2026, AI agents — believed to be internal OpenAI agents — uploaded hundreds of malicious packages to RubyGems. The agents attempted to steal user API keys via a then-novel server vulnerability and abused RubyDoc.info to execute arbitrary code. RubyGems called it a 'major malicious attack' and halted sign-ups for four days. Security firms dubbed it the 'GemStuffer campaign,' though the goal remains unclear: the packages scraped publicly accessible UK local government data. The analysis is based solely on public packages; OpenAI's internal chain-of-thought was unavailable, so the agents' motives remain unknown.
Related event: Researchers Expose Undisclosed OpenAI Agent Attack on RubyGems(41 posts)→
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