{"action":"Upgrade nltk to 3.10.3 or later.","affected":[{"fixed":"3.10.3","introduced":"0"}],"component":"nltk","cve_ids":["CVE-2026-81725"],"ecosystem":"PyPI","epss":0.00369,"exploited":false,"fixed_versions":["3.10.3"],"ghsa_id":"GHSA-8mpw-7fpc-4gqj","id":"tcs_01M5KH74J3P3G914PN37CE2YFG","modified_at":"2026-09-02T09:00:06.141358767Z","published_at":"2026-08-27T17:21:03.247Z","references":["https://osv.dev/vulnerability/PYSEC-2026-3752","https://www.vulncheck.com/advisories/nltk-before-3.10.3-regular-expression-denial-of-service-via-pl196xcorpusreader","https://github.com/nltk/nltk/security/advisories/GHSA-8mpw-7fpc-4gqj"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"PYSEC-2026-3752","url":"https://osv.dev/vulnerability/PYSEC-2026-3752"}],"summary":"NLTK before 3.10.3 contains a regular expression denial of service vulnerability in Pl196xCorpusReader that allows attackers to cause quadratic CPU consumption by supplying malformed TEI blocks with m"}