{"action":"Upgrade nltk to 3.10.3 or later.","affected":[{"fixed":"3.10.3","introduced":"0"}],"component":"nltk","cve_ids":["CVE-2026-78681"],"ecosystem":"PyPI","epss":0.00521,"exploited":false,"fixed_versions":["3.10.3"],"ghsa_id":"GHSA-97qj-x29f-37w7","id":"tcs_01M5KFA3V1QN2Z66ETMP8DQ4Y1","modified_at":"2026-09-08T16:45:04.193148017Z","published_at":"2026-09-08T16:42:18Z","references":["https://osv.dev/vulnerability/GHSA-97qj-x29f-37w7","https://github.com/nltk/nltk/security/advisories/GHSA-97qj-x29f-37w7","https://nvd.nist.gov/vuln/detail/CVE-2026-78681","https://github.com/nltk/nltk/commit/e91789c9a043296ad04912ce171c22776d45963b","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-2026-3748.yaml","https://www.vulncheck.com/advisories/nltk-before-entity-expansion-dos-via-elementtree"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-97qj-x29f-37w7","url":"https://osv.dev/vulnerability/GHSA-97qj-x29f-37w7"},{"source":"nvd","source_id":"CVE-2026-78681","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78681"}],"summary":"NLTK: Entity-expansion DoS (billion laughs) via remaining raw ElementTree parses"}