PyPI PACKAGE

nltk 3.10.2

Block

PkgFire would stop this release from installing.·Checked 17 hours ago·Published 5 August 2026

pypi.org

Why

  • blockVulnerability

    PYSEC-2026-3735 (fixed in 3.10.3)

  • blockVulnerability

    PYSEC-2026-3749 (fixed in 3.10.3)

  • blockVulnerability

    NLTK: JVM argument injection bypass via per-call options in the NLTK Stanford wrappers (incomplete fix of CVE-2026-12841) (fixed in 3.10.3)

  • blockVulnerability

    NLTK: Allowlisted pickle loaders still permit code execution in current source (fixed in 3.10.3)

Provenance

A registry signature proves the registry served these bytes unaltered. Build provenance proves which workflow built them from which commit; a stolen publishing token can fake the first but not the second.

Signature
Not signed
Build provenance
None, and no earlier version had any

What the code does

On its own this is weak signal: plenty of honest libraries read files or talk to the network. What PkgFire watches is a release gaining something the one before it did not.

Code reading

PkgFire's own reading of the files: what the code can do.

  • code-evalnltk/decorators.py, nltk/internals.py, nltk/parse/evaluate.py, nltk/tokenize/punkt.py, nltk/tokenize/texttiling.py
  • code-execnltk/__init__.py, nltk/classify/megam.py, nltk/classify/senna.py, nltk/classify/tadm.py, nltk/classify/weka.py
  • code-networknltk/app/wordnet_app.py, nltk/corpus/reader/childes.py, nltk/data.py, nltk/downloader.py, nltk/parse/corenlp.py
  • import-execnltk/__init__.py

Source patterns

Patterns found in the source, including those malware is known to use.

  • capability-filesystem-delete
  • capability-filesystem-read
  • capability-filesystem-write-executable
  • capability-network-download
  • capability-network-outbound
  • capability-process-schedule
  • capability-process-spawn
  • threat-filesystem-read
  • threat-runtime-obfuscation
  • threat-runtime-obfuscation-unicode

Other checked releases

Check every dependency before it installs

This page is one release. PkgFire checks every package in your lockfile, on every install and in every pull request, and blocks the bad ones before they run.

Start free How it works