Hugging Face Transformers downloads custom generation code before trust consent
A vulnerability in Hugging Face Transformers (versions 4.49.0, <= 5.8.1) allows remote Python files to be written to local disk without user consent when using GenerativePreTrainedModel.load_custom_generate(). The function fetches and caches a remote module file before performing the required trust_remote_code consent check, inverting the security model enforced by other code-loading paths (such as AutoConfig, AutoModel, and AutoTokenizer). As a result, attacker‑controlled Python code from custom_generate/generate.py is copied into the user’s ~/.cache/huggingface/modules directory even if the user declines the trust prompt. Although execution is correctly gated, the file write is not reversible and can persist across sessions. This can lead to persistent, unauthorized files on disk and stale cache collisions where cached attacker code may later be executed during trusted model loads. The issue stems from an unconditional file write in dynamic_module_utils.py prior to any trust verification.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Python (PyPI) | transformers | >= 4.49.0, <= 5.8.1 | sin corrección |
Referencias
- https://nvd.nist.gov/vuln/detail/CVE-2026-80047
- https://github.com/huggingface/transformers/pull/48620
- https://github.com/huggingface/transformers/commit/cbc1651a032b923da7f4b44b3d0e6f68e6ba6b55
- https://github.com/huggingface/transformers
- https://kb.cert.org/vuls/id/456290
- https://www.kb.cert.org/vuls/id/456290
- https://pypi.org/project/transformers
- https://github.com/advisories/GHSA-x9r9-c232-4q39
- Vector CVSS
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- Debilidad (CWE)
CWE-273- Plataforma
- Python (PyPI)
- Paquete
transformers- Publicada
- 01.09.2026
- Actualizado
- 11.10.2026 15:18
Fuentes y licencias
OSV / GitHub Advisory Database - PYSEC-2026-4174 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-x9r9-c232-4q39 - CC BY 4.0
Historial de vulnerabilidades: transformers
Todas las vulnerabilidades publicadas de este paquete (Python (PyPI)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 32
- Primera → última
- 05.2023 09.2026
- Sin corrección
- 9
- Explotada en ataques
- 0
Distribución por gravedad
- Alta 18
- Media 12
- Baja 2
Divulgaciones por año
- 2023: 3
- 2024: 4
- 2025: 20
- 2026: 5
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Hugging Face Transformers downloads custom generation code before trust consent esta entrada
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