VDB
CVE-2026-109956
CVE-2026-109956
PUBLISHED
CVSS 8.3 HIGH
NLTK through 3.10.3 Path Traversal via WekaClassifier Model Path
Reported by vulncheck · Published October 13, 2026
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| py3-nltk | Wolfi | 3.10.4-r0 |
| py3-nltk | Chainguard | 3.10.4-r0 |
| nltk | nltk | 3.10.3 |
Risk scores
CVSS 4.0
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
Affected products
| Vendor | Product | Versions |
|---|---|---|
| nltk | nltk | 0 |
| wolfi | py3-nltk | 0 |
| chainguard | py3-nltk | 0 |
| nltk | nltk | 0 |
Timeline
- Oct 13, 2026 CVE Published
- Oct 14, 2026 EPSS Score (7 in total, the first dated here)
- Oct 26, 2026 CVE Updated
Query this with the API
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References
- GitHub Security Advisory (GHSA-j456-xh4h-cpf2) vendor-advisory
- VulnCheck Advisory: NLTK through 3.10.3 Path Traversal via WekaClassifier Model Path third-party-advisory