Is CVE-2026-54499 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-54499?

CVE-2026-54499 has a CVSS v3 severity of HIGH (7.5).

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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.