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CVE-2026-54499

Stanza: Remote Code Execution via Unsafe Pickle Deserialization in Model Loaders PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
stanfordnlp / stanzaaffected < 1.12.2

CWE

CWE-502, CWE-676

References

ADP enrichment

CISA-ADP

No English description supplied.