Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Stanford | Stanza | < 1.12.2 |
Related Weaknesses (CWE)
References
- https://github.com/stanfordnlp/stanza/commit/b745008c68c9e50ccb5acd537cb6f2453f8Patch
- https://github.com/stanfordnlp/stanza/pull/1587Issue TrackingPatch
- https://github.com/stanfordnlp/stanza/releases/tag/v1.12.2Release Notes
- https://github.com/stanfordnlp/stanza/security/advisories/GHSA-v5jw-96jm-7h2cExploitVendor Advisory
- https://github.com/stanfordnlp/stanza/security/advisories/GHSA-v5jw-96jm-7h2cExploitVendor Advisory
FAQ
What is CVE-2026-54499?
CVE-2026-54499 is a vulnerability with a CVSS score of 7.5 (HIGH). 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.P...
How severe is CVE-2026-54499?
CVE-2026-54499 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-54499?
Check the references section above for vendor advisories and patch information. Affected products include: Stanford Stanza.