CVE-2026-54499

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 products

Pytorch, Stanza

Stanford Stanza

< 1.12.2

Fix

Available

CVSS 3.1

7.5 HIGH

EPSS

0.3% (27th percentile)

Weakness

CWE-502, CWE-676

NVD status

Analyzed

Published

2026-07-08

No exploit for CVE-2026-54499 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.