CVE-2026-54499

Description

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 such as stanza.models.common.pretrain.Pretrain.load() attempt torch.load(..., weights_only=True) but fall back to torch.load(..., weights_only=False) on attacker-controllable pickle.UnpicklingError, allowing a malicious .pt pretrain or model file to execute arbitrary pickle code when a Stanza NLP pipeline loads it. This issue is fixed in version 1.12.2.

CVSS Vector

References

• https://github.com/stanfordnlp/stanza/commit/b745008c68c9e50ccb5acd537cb6f2453f8b7ad4
• https://github.com/stanfordnlp/stanza/pull/1587
• https://github.com/stanfordnlp/stanza/releases/tag/v1.12.2
• https://github.com/stanfordnlp/stanza/security/advisories/GHSA-v5jw-96jm-7h2c
• https://github.com/stanfordnlp/stanza/security/advisories/GHSA-v5jw-96jm-7h2c