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Critical Zero-Day Vulnerabilities Found in PickleScan Tool

First seen 4 Dec 2025, 13:40 UTC

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ThreatCluster March 12, 2026 at 13:27 UTC

Multiple critical zero-day vulnerabilities have been identified in PickleScan, an open-source tool used for scanning machine learning models for malicious code. This tool is widely utilized in the AI community, including by Hugging Face, to evaluate PyTorch models saved in Python's pickle format, which can execute arbitrary Python code when loaded.

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