PyPI/nltk CVE-2026-70626: medium 6.2, EPSS 0.20%

NLTK: Symlink escape in CorpusReader allows arbitrary local file read outside the corpus root

Action: Upgrade nltk to 3.9.4 or later.

pip install nltk==3.9.4

Affected

Fixed versions

Sources

• osv: GHSA-r6gq-whwq-mvg9
• https://github.com/nltk/nltk/security/advisories/GHSA-r6gq-whwq-mvg9
• https://nvd.nist.gov/vuln/detail/CVE-2026-70626
• https://github.com/nltk/nltk/pull/3522
• https://github.com/nltk/nltk/commit/1b0e519e2324bc1a273d56edee63e44d0ad85b48
• https://github.com/nltk/nltk
• https://github.com/nltk/nltk/releases/tag/3.9.4
• https://github.com/pypa/advisory-database/tree/main/vulns/nltk/PYSEC-2026-3732.yaml
• https://www.vulncheck.com/advisories/nltk-before-symlink-escape-via-corpusreader

CVE-2026-70626 · published 2026-09-08T15:26:47Z · modified 2026-09-08T15:30:07.726015360Z · JSON