CVE-2026-79676: NLTK: Corpus readers follow symlinks outside trusted roots despite pathsec enforcement
Several corpus readers still step outside NLTK’s symlink-aware trusted-root model. They derive in-root paths from trusted corpus state, convert those paths back into plain strings, and reopen them with built-in open() rather than nltk.pathsec.open().
References
- github.com/advisories/GHSA-p4rw-rvv2-7xwr
- github.com/nltk/nltk/commit/10d34b3f4fe3fec74b76527a409eb0acbac2e8ab
- github.com/nltk/nltk/releases/tag/v3.10.3
- github.com/nltk/nltk/security/advisories/GHSA-p4rw-rvv2-7xwr
- github.com/pypa/advisory-database/tree/main/vulns/nltk/PYSEC-2026-3737.yaml
- nvd.nist.gov/vuln/detail/CVE-2026-79676
- www.vulncheck.com/advisories/nltk-before-path-traversal-via-symlink-bypass
Code Behaviors & Features
Detect and mitigate CVE-2026-79676 with GitLab Dependency Scanning
Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →