CVE-2026-62383
nltk IPIPANCorpusReader Symlink Arbitrary File Read
- State
- Published
- Severity
- 6.8 Medium
- Published
- Aug 22, 2026
- Updated
- Aug 26, 2026
- Reserved
- Jul 13, 2026
Description
nltk versions before 3.10.2 contain a symlink-based arbitrary file read vulnerability in IPIPANCorpusReader methods that bypass nltk.pathsec validation entirely. Attackers can place a symlink in the corpus root directory and read arbitrary files accessible to the process by calling channels(), domains(), categories(), or fileids() methods with the symlink filename.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.8 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.5 Medium | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products
| Product | Versions |
|---|---|
nltknltk |
|
References
- GitHub Security Advisory (GHSA-3hhw-38pf-pxj6)vendor-advisory
- VulnCheck Advisory: nltk IPIPANCorpusReader Symlink Arbitrary File Readthird-party-advisory
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