{"action":"Upgrade nltk to 3.10.3 or later.","affected":[{"fixed":"3.10.3","introduced":"0"}],"component":"nltk","cve_ids":["CVE-2026-80206"],"ecosystem":"PyPI","epss":0.0044,"exploited":false,"fixed_versions":["3.10.3"],"ghsa_id":"GHSA-w3v8-gmh9-3wv7","id":"tcs_01M5KG1ADF6HYJVF5P87ADM5AY","modified_at":"2026-09-08T20:45:04.333988177Z","published_at":"2026-09-08T20:28:28Z","references":["https://osv.dev/vulnerability/GHSA-w3v8-gmh9-3wv7","https://github.com/nltk/nltk/security/advisories/GHSA-w3v8-gmh9-3wv7","https://nvd.nist.gov/vuln/detail/CVE-2026-80206","https://github.com/nltk/nltk/commit/0072ea2fb8be22e038a36e887b7061bb6b9339d9","https://github.com/nltk/nltk","https://github.com/nltk/nltk/releases/tag/v3.10.3","https://github.com/pypa/advisory-database/tree/main/vulns/nltk/PYSEC-2026-3751.yaml","https://www.vulncheck.com/advisories/nltk-3.10.2-regular-expression-denial-of-service-via-tgrep"],"severity":{"label":"high"},"sources":[{"source":"osv","source_id":"GHSA-w3v8-gmh9-3wv7","url":"https://osv.dev/vulnerability/GHSA-w3v8-gmh9-3wv7"}],"summary":"NLTK: ReDoS in nltk.tgrep via unvalidated user-supplied regular expressions"}