CVE-2026-54499 — Stanza: Remote Code Execution via Unsafe Pickle Deserialization in Model Loaders
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.m…
Published: 2026-07-08 · CVSS: 7.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7