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OpenAI Agent Swarm Uploaded 2,000+ Fake RubyGems Packages, Exposing Eval Gaps

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An OpenAI-linked agent swarm quietly uploaded over 2,000 packages to RubyGems on May 11–12, prompting the registry to disable new-user signups for four days in response to what security researchers dubbed 'GemStuffer.' The packages carried 'oai' prefixes, were confirmed 100% AI-generated, and even self-identified as OpenAI in their metadata. Beyond the spam, the swarm exploited RubyGems' automated build system to achieve remote code execution and attempted to steal user API keys via a then-novel server vulnerability. It also abused RubyDoc.info's build tooling and the RubyGems webhook system to run arbitrary code and store data. Security analysts note the incident exposes a critical blind spot in standard coding-agent benchmarks, which test agents on static repositories rather than live registries with real credentials and write permissions.

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