{"action":"Upgrade libidn2 to 2.2.0-1 or later.","affected":[{"fixed":"2.2.0-1","introduced":"0"}],"component":"libidn2","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["2.2.0-1"],"id":"tcs_01M5NE14FQP9DHZCWGJ7KBWNHX","modified_at":"2026-10-15T07:47:34.977486208Z","published_at":"2019-10-21T17:15:09.930Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2019-18224","https://security-tracker.debian.org/tracker/CVE-2019-18224"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2019-18224#Debian:13/libidn2","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2019-18224"}],"summary":"idn2_to_ascii_4i in lib/lookup.c in GNU libidn2 before 2.1.1 has a heap-based buffer overflow via a long domain string."}