HIGH7.5

PYSEC-2026-3728

Quick fix

PYSEC-2026-3728 — nltk: upgrade to the fixed version with the command below.

pip install --upgrade 'nltk>=3.10.0'

Details

NLTK versions before 3.10.0 contain a path traversal vulnerability in FramenetCorpusReader and NKJPCorpusReader that allows attackers to parse XML files outside the corpus root by supplying unsafe selectors or poisoned index state. Attackers can exploit frame_by_name, doc, lu, and header methods with crafted parameters to read arbitrary XML files accessible to the application.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/nltk

Introduced in: 0Fixed in: 3.10.0

Fixpip install --upgrade 'nltk>=3.10.0'

References

https://www.vulncheck.com/advisories/nltk-path-traversal-via-framenet-and-nkjp-readers[ADVISORY]
https://github.com/nltk/nltk/security/advisories/GHSA-568f-pv23-39p4[EVIDENCE]