CVE-2026-1839: A vulnerability in the HuggingFace Transformers library, specifically in the `Trainer` class, allows for arbitrary code

A vulnerability in HuggingFace Transformers' `Trainer` class (a tool for training AI models) allows attackers to run arbitrary code by providing a malicious checkpoint file. The problem occurs because the `_load_rng_state()` method uses `torch.load()` without the `weights_only=True` parameter (a safety setting that restricts what code can run), leaving systems vulnerable when using PyTorch versions below 2.6.