PYSEC-2026-3075 Stanza: Remote Code Execution via Unsafe Pickle Deserialization in Model Loaders

Summary Stanza 1.12.0 attempts to safely load PyTorch checkpoint files using torch.load..., weightsonly=True, but automatically falls back to the fully unsafe torch.load..., weightsonly=False when the safe load raises pickle.UnpicklingError. Because the UnpicklingError condition is fully...

CVE-2026-54499

A flaw was found in Stanza, a Stanford NLP Python library. Stanza model loaders, such as stanza.models.common.pretrain.Pretrain.load, attempt to safely load PyTorch checkpoint files. However, if this safe load fails due to an attacker-controllable pickle.UnpicklingError, the loaders fall back to ...

Linux Distros Unpatched Vulnerability : CVE-2026-54499

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Stanza is a Stanford NLP Python library for tokenization, sentence segmentation, NER, and parsing of many human languages. Prior to 1.12.2, Stanza model loaders...

PT-2026-51062

Name of the Vulnerable Software and Affected Versions Stanza version 1.12.0 Description An issue exists where the software attempts to load PyTorch checkpoint files using a safe method but automatically falls back to an unsafe deserialization process when a pickle.UnpicklingError occurs. Because...