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Vulnerability Details 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.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.003

EPSS Ranking 22.1%

CVSS Severity

CVSS v3 Score 7.5

References

Products affected by CVE-2026-54499

Stanford » Stanza » Version: 0.1.0

cpe:2.3:a:stanford:stanza:0.1.0
Stanford » Stanza » Version: 0.1.2

cpe:2.3:a:stanford:stanza:0.1.2
Stanford » Stanza » Version: 0.2.0

cpe:2.3:a:stanford:stanza:0.2.0
Stanford » Stanza » Version: 1.0.0

cpe:2.3:a:stanford:stanza:1.0.0
Stanford » Stanza » Version: 1.0.1

cpe:2.3:a:stanford:stanza:1.0.1
Stanford » Stanza » Version: 1.1.1

cpe:2.3:a:stanford:stanza:1.1.1
Stanford » Stanza » Version: 1.10.0

cpe:2.3:a:stanford:stanza:1.10.0
Stanford » Stanza » Version: 1.10.1

cpe:2.3:a:stanford:stanza:1.10.1
Stanford » Stanza » Version: 1.11.0

cpe:2.3:a:stanford:stanza:1.11.0
Stanford » Stanza » Version: 1.11.1

cpe:2.3:a:stanford:stanza:1.11.1
Stanford » Stanza » Version: 1.12.0

cpe:2.3:a:stanford:stanza:1.12.0
Stanford » Stanza » Version: 1.12.1

cpe:2.3:a:stanford:stanza:1.12.1
Stanford » Stanza » Version: 1.2.0

cpe:2.3:a:stanford:stanza:1.2.0
Stanford » Stanza » Version: 1.2.1

cpe:2.3:a:stanford:stanza:1.2.1
Stanford » Stanza » Version: 1.2.2

cpe:2.3:a:stanford:stanza:1.2.2
Stanford » Stanza » Version: 1.2.3

cpe:2.3:a:stanford:stanza:1.2.3
Stanford » Stanza » Version: 1.3.0

cpe:2.3:a:stanford:stanza:1.3.0
Stanford » Stanza » Version: 1.4.0

cpe:2.3:a:stanford:stanza:1.4.0
Stanford » Stanza » Version: 1.4.1

cpe:2.3:a:stanford:stanza:1.4.1
Stanford » Stanza » Version: 1.4.2

cpe:2.3:a:stanford:stanza:1.4.2
Stanford » Stanza » Version: 1.5.0

cpe:2.3:a:stanford:stanza:1.5.0
Stanford » Stanza » Version: 1.5.1

cpe:2.3:a:stanford:stanza:1.5.1
Stanford » Stanza » Version: 1.6.0

cpe:2.3:a:stanford:stanza:1.6.0
Stanford » Stanza » Version: 1.6.1

cpe:2.3:a:stanford:stanza:1.6.1
Stanford » Stanza » Version: 1.7.0

cpe:2.3:a:stanford:stanza:1.7.0
Stanford » Stanza » Version: 1.8.0

cpe:2.3:a:stanford:stanza:1.8.0
Stanford » Stanza » Version: 1.8.1

cpe:2.3:a:stanford:stanza:1.8.1
Stanford » Stanza » Version: 1.8.2

cpe:2.3:a:stanford:stanza:1.8.2
Stanford » Stanza » Version: 1.9.0

cpe:2.3:a:stanford:stanza:1.9.0
Stanford » Stanza » Version: 1.9.1

cpe:2.3:a:stanford:stanza:1.9.1
Stanford » Stanza » Version: 1.9.2

cpe:2.3:a:stanford:stanza:1.9.2

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Vulnerability Details CVE-2026-54499

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