Description
NLTK versions before 3.10.3 contain a remote code execution vulnerability in allowlisted pickle loaders that trust entire module namespaces instead of specific safe callables. Attackers can craft malicious pickle payloads invoking dangerous in-namespace functions like ReppTokenizer._execute and numpy.f2py.crackfortran.myeval through pickle REDUCE to execute arbitrary commands during model or tokenizer artifact loading.
CVSS 9.8EPSS 1.166%Risk 1.08
View source- Published
- 2026-08-25 12:16:28
- Affected versions
- <3.10.3
- Type
- Library
- Last modified
- 2026-08-25 16:17:27
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H