Machine learning (ML) systems are increasingly vulnerable to supply-chain attacks that exploit the intricate dependencies inherent in open-source software (OSS). However, securing the ML ecosystem remains challenging due to regular paradigmatic changes in the ecosystem, their dynamic runtime environments, and lack of security awareness in open-source ML projects. In this paper, we introduce a novel class of supply-chain attacks that specifically target ML models, relying on inherent insecurity of Python as a programming language. Such attacks leverage traditional supply-chain vulnerabilities to inject innocuous-looking code that weakens the ML model's robustness. We then conduct an LLM-assisted analysis of discussions from the top 50 ML projects on GitHub to understand the current state of supply-chain security awareness among contributors. Despite the need for a higher standard of security practices, our findings reveal a similar level of security awareness between the ML and non-ML communities, highlighting the need for enhanced safeguards against ML-specific supply-chain attacks.