CVE-2026-79676

NameCVE-2026-79676
DescriptionNLTK 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().
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
nltk (PTS)bullseye3.5-1vulnerable
bookworm3.8-1vulnerable
trixie3.9.1-2vulnerable
forky, sid3.10.3-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
nltksource(unstable)3.10.3-1

Notes

https://github.com/nltk/nltk/security/advisories/GHSA-p4rw-rvv2-7xwr

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