[r/LocalLLaMA] The Silent OpenAI Fallback: Why LlamaIndex Might Be Leaking Your "100% Local" RAG Data

Summary

A critical vulnerability has been discovered in LlamaIndex, revealing a silent fallback mechanism that defaults to OpenAI. This means "100% local" or privacy-first RAG systems built using the library could inadvertently send user data to OpenAI if developers fail to explicitly specify local `llm=` or `embed_model=` arguments. Users are strongly advised to audit their LlamaIndex implementations immediately to prevent potential data leaks.

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