Vulnerability Details CVE-2026-79676
NLTK versions before 3.10.3 contain a path traversal vulnerability in corpus readers that reopen root-derived paths using built-in open() instead of nltk.pathsec.open(), allowing symlinks to escape trusted roots. Attackers who stage symlinked corpus files under a trusted data root can disclose outside-root content through normal corpus reader methods like channels(), domains(), and synonyms().
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 21.8%
CVSS Severity
CVSS v3 Score 5.9