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nltk 3.10.3: known vulnerabilities

The comparison for nltk 3.10.3 is incomplete. Review the confirmed matches below.

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Vulnerabilities: 2

  1. CVE-2026-109956

    High · CVSS 8.3EPSS 0.32%Fix available

    NLTK through 3.10.3 Path Traversal via WekaClassifier Model Path

    NLTK through 3.10.3 contains a path traversal vulnerability in WekaClassifier that allows attackers to bypass nltk.pathsec containment by supplying unvalidated model paths. Attackers controlling the model_filename or model argument can make the weka JVM write files via -d or probe files via -l outside allowed data roots.

    • Update to 3.10.4
    Published Updated
  2. CVE-2026-81726

    High · CVSS 8.3EPSS 0.34%No fix published

    NLTK through 3.10.3 Path Traversal via Model-Artifact APIs

    NLTK through 3.10.3 contains a path traversal vulnerability in model-artifact APIs that bypass pathsec enforcement by using raw file operations on caller-controlled paths. Attackers can read or write files outside allowed sandbox roots through TransitionParser, AveragedPerceptron, PerceptronTagger, and maxent parameter APIs when pathsec is enabled.

    Published Updated

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