{"action":"Upgrade nltk to 3.10.0 or later.","affected":[{"fixed":"3.10.0","introduced":"0"}],"component":"nltk","cve_ids":["CVE-2026-65915"],"ecosystem":"PyPI","epss":0.0041,"exploited":false,"fixed_versions":["3.10.0"],"ghsa_id":"GHSA-72r2-7mfr-5xr9","id":"tcs_01M5KH710TK562GP9N9JM9EH28","modified_at":"2026-09-01T09:15:03.471501849Z","published_at":"2026-08-22T15:16:19.500Z","references":["https://osv.dev/vulnerability/PYSEC-2026-3731","https://www.vulncheck.com/advisories/nltk-before-arbitrary-file-read-via-filesystempathpointer","https://github.com/nltk/nltk/security/advisories/GHSA-72r2-7mfr-5xr9"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"PYSEC-2026-3731","url":"https://osv.dev/vulnerability/PYSEC-2026-3731"}],"summary":"NLTK versions before 3.10.0 contain a logic bug in FileSystemPathPointer.open() where the sandbox validation check compares a normalized path against itself, making the security check permanently iner"}