{"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_01M5NDQY53VGRB8K1CPZPTR1Z6","modified_at":"2026-10-15T07:47:25.294669139Z","published_at":"2019-10-22T16:15:10.877Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2019-12290","https://security-tracker.debian.org/tracker/CVE-2019-12290"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2019-12290#Debian:13/libidn2","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2019-12290"}],"summary":"GNU libidn2 before 2.2.0 fails to perform the roundtrip checks specified in RFC3490 Section 4.2 when converting A-labels to U-labels. This makes it possible in some circumstances for one domain to imp"}