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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.6 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/stanfordnlp/stanza/commit/b745008c68c9e50ccb5acd537cb6f2453f8b7ad4	Patch
https://github.com/stanfordnlp/stanza/pull/1587	Issue Tracking Patch
https://github.com/stanfordnlp/stanza/releases/tag/v1.12.2	Release Notes
https://github.com/stanfordnlp/stanza/security/advisories/GHSA-v5jw-96jm-7h2c	Exploit Vendor Advisory
https://github.com/stanfordnlp/stanza/security/advisories/GHSA-v5jw-96jm-7h2c	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:stanford:stanza:*:*:*:*:*:python:*:*

History

25 Oct 2026, 17:10

Type	Values Removed	Values Added
Summary		(es) Stanza es una biblioteca Python de PNL de Stanford para tokenización, segmentación de oraciones, NER y análisis sintáctico de muchos lenguajes humanos. Antes de la versión 1.12.2, los cargadores de modelos de Stanza, como stanza.models.common.pretrain.Pretrain.load(), intentan torch.load(..., weights_only=True) pero recurren a torch.load(..., weights_only=False) ante un pickle.UnpicklingError controlable por el atacante, lo que permite que un archivo de preentrenamiento o modelo .pt malicioso ejecute código pickle arbitrario cuando una canalización de PNL de Stanza lo carga. Este problema está solucionado en la versión 1.12.2.

Information

Published : 2026-07-08 23:16

Updated : 2026-10-25 17:10

NVD link : CVE-2026-54499

Mitre link : CVE-2026-54499

CVE.ORG link : CVE-2026-54499

JSON object : View

Products Affected

stanford

stanza

CWE

CWE-502

Deserialization of Untrusted Data

CWE-676

Use of Potentially Dangerous Function

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