{"action":"Upgrade nltk to 3.10.0 or later.","affected":[{"fixed":"3.10.0","introduced":"0"}],"component":"nltk","cve_ids":["CVE-2026-78683"],"ecosystem":"PyPI","epss":0.0051,"exploited":false,"fixed_versions":["3.10.0"],"ghsa_id":"GHSA-rhp5-r9x4-f5g2","id":"tcs_01M5KH71E6BK37HPZ8YGDANYRY","modified_at":"2026-09-01T09:15:02.843391088Z","published_at":"2026-08-25T02:16:53.033Z","references":["https://osv.dev/vulnerability/PYSEC-2026-3734","https://www.vulncheck.com/advisories/nltk-before-remote-code-execution-via-unsafe-pickle-deserialization","https://github.com/nltk/nltk/security/advisories/GHSA-rhp5-r9x4-f5g2"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"PYSEC-2026-3734","url":"https://osv.dev/vulnerability/PYSEC-2026-3734"}],"summary":"NLTK before 3.10.0 (affected versions <=3.9.4) contains an unsafe pickle deserialization vulnerability in the TransitionParser.parse() method (nltk/parse/transitionparser.py). The method calls pickle_"}