{"action":"Upgrade libidn2 to 2.1.1-r0 or later.","affected":[{"fixed":"2.1.1-r0","introduced":"0"}],"component":"libidn2","cve_ids":[],"ecosystem":"Alpine","ecosystem_qualifier":"Alpine:v3.19","exploited":false,"fixed_versions":["2.1.1-r0"],"id":"tcs_01M5NBHFXW0TYXFSD3R46QXYCM","modified_at":"2026-09-21T06:17:52.501534942Z","published_at":"2019-10-21T17:15:09.930Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2019-18224","https://security.alpinelinux.org/vuln/CVE-2019-18224"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2019-18224#Alpine:v3.19/libidn2","url":"https://osv.dev/vulnerability/ALPINE-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."}