High severity7.5NVD Advisory· Published Jul 8, 2026· Updated Jul 13, 2026
CVE-2026-54499
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
stanzaPyPI | < 1.12.2 | 1.12.2 |
Affected products
2Patches
Vulnerability mechanics
References
5- github.com/stanfordnlp/stanza/commit/b745008c68c9e50ccb5acd537cb6f2453f8b7ad4nvdPatch
- github.com/stanfordnlp/stanza/pull/1587nvdIssue TrackingPatch
- github.com/stanfordnlp/stanza/security/advisories/GHSA-v5jw-96jm-7h2cnvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-v5jw-96jm-7h2cghsaADVISORY
- github.com/stanfordnlp/stanza/releases/tag/v1.12.2nvdRelease Notes
News mentions
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