CVE-2026-109956CWE-22path-traversal

CVE-2026-109956

High · published October 13, 2026

CVSS v3.1
7.0
EPSS
0%
Percentile
23.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.0 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L
CVSS v4.0
8.3 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N
EPSS
0.00318 · 23.4th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-10-13T18:17Z
References (2)
https://github.com/nltk/nltk/security/advisories/GHSA-j456-xh4h-cpf2 · [email protected]https://www.vulncheck.com/advisories/nltk-through-3.10.3-path-traversal-via-wekaclassifier-model-path · [email protected]
EPSS history
Timeline
  • 15 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 13 OCT 13:27Z
    NLTK through 3.10.3 Path Traversal via WekaClassifier Model Path
    cvelistv5
  • 13 OCT 13:27Z
    NLTK through 3.10.3 Path Traversal via WekaClassifier Model Path
    cvelistv5