{"action":"Upgrade nltk to 3.10.3 or later.","affected":[{"fixed":"3.10.3","introduced":"0"}],"component":"nltk","cve_ids":["CVE-2026-79676"],"ecosystem":"PyPI","epss":0.00447,"exploited":false,"fixed_versions":["3.10.3"],"ghsa_id":"GHSA-p4rw-rvv2-7xwr","id":"tcs_01M5KH71WG6H529SJKTXQRQ4YJ","modified_at":"2026-09-01T09:15:04.069150741Z","published_at":"2026-08-25T16:17:28.177Z","references":["https://osv.dev/vulnerability/PYSEC-2026-3737","https://www.vulncheck.com/advisories/nltk-before-path-traversal-via-symlink-bypass","https://github.com/nltk/nltk/security/advisories/GHSA-p4rw-rvv2-7xwr"],"severity":{"label":"medium","score":5.9},"sources":[{"source":"osv","source_id":"PYSEC-2026-3737","url":"https://osv.dev/vulnerability/PYSEC-2026-3737"},{"source":"nvd","source_id":"CVE-2026-79676","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-79676"}],"summary":"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 tr"}