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Quantization-Conditioned Backdoor Attacks Target Open-Weight LLM Agents
A new arXiv paper describes an attack in which an adversary releases a full-precision model checkpoint that passes standard audits but behaves maliciously once it is quantized for deployment. Because quantization is a common default path for running open-weight agent models, the technique could let compromised agents slip past pre-release checks. The work frames this as a supply-chain risk for quantized LLM deployments.