External Control of File Name or Path Affecting nltk package, versions [,3.10.3)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-NLTK-19276670
- published27 Aug 2026
- disclosed25 Aug 2026
- creditnguyencanhthuong
Introduced: 25 Aug 2026
NewCVE-2026-79674 (opens in a new tab)How to fix?
Upgrade nltk to version 3.10.3 or higher.
Overview
nltk is a Natural Language Toolkit (NLTK) is a Python package for natural language processing.
Affected versions of this package are vulnerable to External Control of File Name or Path through the CorpusReader.__init__ constructor and the LinThesaurusCorpusReader and PanLexLiteCorpusReader implementations in nltk/corpus/reader/api.py, nltk/corpus/reader/lin.py, and nltk/corpus/reader/panlex_lite.py. An attacker can make NLTK read files or open an SQLite database outside the intended nltk.pathsec sandbox by supplying a corpus root path to a reader constructor. The vulnerable constructors turn caller-supplied roots into paths and then reach raw open() or sqlite3.connect() on derived locations without sandbox validation, so a process using these readers can expose out-of-root corpus data. In the affected deployments, this lets untrusted corpus-root input bypass the data-root boundary and load local file contents from outside the intended corpus tree.