CVE-2026-79784Vocos through 0.1.0 Arbitrary Code Execution via Unrestricted class_path in Model Configuration

Official description

Vocos instantiates a class named by a configuration file without restricting which class may be named. instantiate_class in vocos/pretrained.py takes the class_path value from the configuration, splits it into a module and an attribute, imports the module with __import__, resolves the attribute with getattr, and calls the result as args_class(*args, **kwargs) where kwargs is the config's own init_args mapping. No allowlist constrains the dotted path, so a configuration may name any importable callable and supply the arguments it is called with. Vocos.from_hparams reaches this for each of the feature_extractor, backbone and head entries, and Vocos.from_pretrained reaches it with a remote file: it downloads config.yaml from a caller-named Hugging Face repository and passes it straight to from_hparams. Loading a model from a repository the user does not control therefore executes code of the repository owner's choosing in the loading process. The neighbouring torch.load of the downloaded weights is a separate matter and is constrained on PyTorch releases that default weights_only to true, which leaves this path as the reachable one.

Affected products (as reported)

References

• https://github.com/gemelo-ai/vocos product
• https://github.com/gemelo-ai/vocos/issues/76 issue-tracking
• https://github.com/gemelo-ai/vocos/blob/main/vocos/pretrained.py technical-description
• https://pypi.org/project/vocos/ product
• VulnCheck Advisory: Vocos through 0.1.0 Arbitrary Code Execution via Unrestricted class_path in Model Configuration third-party-advisory