{"action":"Upgrade jython to 2.5.3-17 or later.","affected":[{"fixed":"2.5.3-17","introduced":"0"}],"component":"jython","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["2.5.3-17"],"id":"tcs_01M5NBK06Q1FNXCJCQKATT2C3H","modified_at":"2026-09-22T07:00:47.208363817Z","published_at":"2017-07-06T16:29:00.203Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2016-4000","https://security-tracker.debian.org/tracker/CVE-2016-4000"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2016-4000#Debian:14/jython","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2016-4000"}],"summary":"Jython before 2.7.1rc1 allows attackers to execute arbitrary code via a crafted serialized PyFunction object."}