CVE-2026-81726
NLTK through 3.10.3 Path Traversal via Model-Artifact APIs
- State
- Published
- Severity
- 8.3 High
- Published
- Aug 27, 2026
- Updated
- Oct 30, 2026
- Reserved
- Aug 27, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.3 High | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.0 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L | VulnCheck |
Weaknesses
- CWE-73 External Control of File Name or Path
Affected Products
| Product | Versions |
|---|---|
nltknltk |
|
References
- GitHub Security Advisory (GHSA-8mgp-746c-j5xp)vendor-advisory
- VulnCheck Advisory: NLTK through 3.10.3 Path Traversal via Model-Artifact APIsthird-party-advisory
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