moyix: by the time you import the malicious package, arbitrary code has already run
moyix · x · 2026-10-22
Security researcher moyix flags a flaw in a discussed scenario involving a hypothetical malicious Python package ("UltraLoss", posing as a spectral regularizer that speeds up fine-tuning of 8-bit quantized models): the moment the pipeline imports and runs the attacker's Python code, attacker-controlled arbitrary code has already executed, so any downstream safeguard is moot. The comment highlights a supply-chain security blind spot in the AI/ML package ecosystem.
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