CVE-2026-70626 — NLTK before 3.9.4 Symlink Escape via CorpusReader
NLTK versions before 3.9.4 contain a symlink escape vulnerability in CorpusReader.open() that allows local attackers to read arbitrary files outside the corpus root. The vulnera…
Published: 2026-08-22 · CVSS: 8.6 · CVSS 4.0
NLTK versions before 3.9.4 contain a symlink escape vulnerability in CorpusReader.open() that allows local attackers to read arbitrary files outside the corpus root. The vulnerability exists because path validation is lexical and does not account for symlink resolution, enabling attackers to place symlinks inside the corpus root to access files outside the intended boundary.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7