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Security2026-05-25 · source-backed

CachePrune: Multi-Tenant LLM Serving Has a Side-Channel Problem.

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New research shows unrestricted cross-user KV cache sharing in LLM serving creates side-channel attacks where adversaries infer other users' inputs by probing for cache reuse. CachePrune introduces privacy-aware sharing that prevents leakage while preserving 85%+ cache reuse. If you're running multi-tenant inference, this paper is required reading.

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2026-05-25-cacheprune-multi-tenant-llm-serving-has-a-side-channel-problem
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source-backed, canonical briefing excerpt