{"action":"Upgrade nltk to 3.9.3 or later.","affected":[{"fixed":"3.9.3","introduced":"0"}],"component":"nltk","cve_ids":["CVE-2025-71408"],"ecosystem":"PyPI","epss":0.00265,"exploited":false,"fixed_versions":["3.9.3"],"ghsa_id":"GHSA-848c-c2cx-j7qx","id":"tcs_01M5KH6KBM84QHSA2SQFAAMEXF","modified_at":"2026-08-19T12:15:03.319052318Z","published_at":"2026-07-24T22:16:50.063Z","references":["https://osv.dev/vulnerability/PYSEC-2026-3657","https://github.com/nltk/nltk/releases/tag/3.9.3","https://github.com/nltk/nltk/commit/66f14096d952ec8f04934f515e027534bd4eb0ac","https://github.com/nltk/nltk/pull/3465","https://www.vulncheck.com/advisories/nltk-eval-injection-via-collocations-py-command-line-arguments","https://aydinnyunus.github.io/2026/06/07/command-injection-nltk-collocations-eval/","https://github.com/advisories/GHSA-848c-c2cx-j7qx"],"severity":{"label":"high","score":7.8},"sources":[{"source":"osv","source_id":"PYSEC-2026-3657","url":"https://osv.dev/vulnerability/PYSEC-2026-3657"},{"source":"nvd","source_id":"CVE-2025-71408","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-71408"}],"summary":"NLTK (Natural Language Toolkit) before version 3.9.3 contains an eval injection vulnerability in the nltk.collocations module that allows an attacker who controls command-line arguments to execute arb"}