{"action":"Upgrade nltk to 3.10.3 or later.","affected":[{"fixed":"3.10.3","introduced":"0"}],"component":"nltk","cve_ids":["CVE-2026-81726"],"ecosystem":"PyPI","epss":0.00339,"exploited":false,"fixed_versions":["3.10.3"],"ghsa_id":"GHSA-8mgp-746c-j5xp","id":"tcs_01M5KH72E6HSNCVP5NE1PSYNVX","modified_at":"2026-09-01T09:15:03.463659349Z","published_at":"2026-08-27T17:21:03.387Z","references":["https://osv.dev/vulnerability/PYSEC-2026-3740","https://www.vulncheck.com/advisories/nltk-through-3.10.3-path-traversal-via-model-artifact-apis","https://github.com/nltk/nltk/security/advisories/GHSA-8mgp-746c-j5xp"],"severity":{"label":"high","score":7},"sources":[{"source":"osv","source_id":"PYSEC-2026-3740","url":"https://osv.dev/vulnerability/PYSEC-2026-3740"},{"source":"nvd","source_id":"CVE-2026-81726","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81726"}],"summary":"NLTK through 3.10.3 contains a path traversal vulnerability in model-artifact APIs that bypass pathsec enforcement by using raw file operations on caller-controlled paths. Attackers can read or write"}