GHSA-cv22-g7mw-8v73

Suggest an improvement
Source
https://github.com/advisories/GHSA-cv22-g7mw-8v73
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-cv22-g7mw-8v73/GHSA-cv22-g7mw-8v73.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-cv22-g7mw-8v73
Aliases
Downstream
Published
2026-08-22T15:31:03Z
Modified
2026-09-10T03:51:13Z
Severity
  • 2.5 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N CVSS Calculator
  • 2.0 (Low) CVSS_V4 - CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
NLTK CrubadanCorpusReader path traversal allows arbitrary file disclosure
Details

NLTK 3.9.4 through 3.10.2 contains a path traversal vulnerability in CrubadanCorpusReader. _load_lang_ngrams joins the corpus root with crubadan_code, the column-0 value read from the corpus table.txt mapping file, and opens the result with the builtin open() rather than the pathsec-validated opener, so os.path.join discards the root when that value is absolute and the read escapes the corpus directory without the containment check nltk.pathsec applies when ENFORCE is set. An attacker who controls a corpus package can disclose file contents outside the corpus root through lang_freq, limited to paths ending in -3grams.txt whose contents parse as token count lines.

Database specific 
{
    "cwe_ids": [
        "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-02T15:32:28Z",
    "nvd_published_at": "2026-08-22T14:16:33Z",
    "severity": "LOW"
}
References

Affected packages

PyPI / nltk

Package

Name
nltk
View open source insights on deps.dev
Purl
pkg:pypi/nltk

Affected ranges

Type
ECOSYSTEM
Events
Introduced
3.9.4
Fixed
3.10.3

Affected versions

3.*
3.9.4
3.10.0
3.10.1
3.10.2

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-cv22-g7mw-8v73/GHSA-cv22-g7mw-8v73.json"