fix(polygraphy): use weights_only=True in torch.load to prevent RCE by tailingy · Pull Request #4728 · NVIDIA/TensorRT

@tailingy

@tailingy

…ia pickle deserialization

Passing weights_only=True to torch.load() restricts deserialization to
tensor data only, blocking arbitrary pickle-based code execution.

Fixes NVBugs #5934574 - [PSIRT] Arbitrary Code Execution via unsafe
torch.load() in Polygraphy JSON deserialization.