{"action":"Upgrade nltk to 3.10.0 or later.","affected":[{"fixed":"3.10.0","introduced":"0"}],"component":"nltk","cve_ids":["CVE-2026-80205"],"ecosystem":"PyPI","epss":0.00651,"exploited":false,"fixed_versions":["3.10.0"],"ghsa_id":"GHSA-rrv8-h7p8-rx55","id":"tcs_01M5KH7491VBGDM2Z127082D0X","modified_at":"2026-09-02T09:00:04.186659911Z","published_at":"2026-08-26T11:16:39.950Z","references":["https://osv.dev/vulnerability/PYSEC-2026-3750","http://www.openwall.com/lists/oss-security/2026/09/01/3","https://www.vulncheck.com/advisories/nltk-before-3.10.0-redos-via-text-findall-unvalidated-regex","https://github.com/nltk/nltk/security/advisories/GHSA-rrv8-h7p8-rx55"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"PYSEC-2026-3750","url":"https://osv.dev/vulnerability/PYSEC-2026-3750"}],"summary":"NLTK versions before 3.10.0 contain a regular expression denial of service vulnerability in Text.findall() and TokenSearcher.findall() methods that accept user-supplied regular expressions without val"}