CVE-2026-109956

HIGH 7.0

NLTK through 3.10.3 Path Traversal via WekaClassifier Model Path

CVSS Score

7.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-22
Vendor	nltk
Product	nltk
Published	Oct 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

Low

Affected Versions

nltk / nltk

0 ≤ 3.10.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/nltk/nltk/security/advisories/GHSA-j456-xh4h-cpf2 vulncheck.com: https://www.vulncheck.com/advisories/nltk-through-3.10.3-path-traversal-via-wekaclassifier-model-path

Credits

🔍 manus-use