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 3.1
- 7.5
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 43% of CVEs (scores of 2026-10-25)
- CWEs
- CWE-502, CWE-676
- Published
- Modified
- Record from
- the NVD, synced
Affected
- stanford:stanza
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-v5jw-96jm-7h2c | PyPI | stanza | <1.12.2 | 1.12.2 |
| PYSEC-2026-3075 | PyPI | stanza | <1.12.2 | 1.12.2 |
References
- https://github.com/stanfordnlp/stanza/commit/b745008c68c9e50ccb5acd537cb6f2453f8b7ad4
- https://github.com/stanfordnlp/stanza/pull/1587
- https://github.com/stanfordnlp/stanza/releases/tag/v1.12.2
- https://github.com/stanfordnlp/stanza/security/advisories/GHSA-v5jw-96jm-7h2c
- https://github.com/stanfordnlp/stanza/security/advisories/GHSA-v5jw-96jm-7h2c