{"id":"USN-8521-1","summary":"libidn vulnerability","details":"It was discovered that Libidn incorrectly handled certain internationalized\ndomain name strings. An attacker could possibly use this issue to obtain\nsensitive information or cause a denial of service.","modified":"2026-07-09T21:44:27.112918483Z","published":"2026-07-09T12:36:22Z","related":["UBUNTU-CVE-2026-57053"],"upstream":["CVE-2026-57053","UBUNTU-CVE-2026-57053"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8521-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-57053"}],"affected":[{"package":{"name":"libidn","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libidn?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.38-4ubuntu1.1"}]}],"versions":["1.33-3","1.33-3build1","1.38-4","1.38-4build1","1.38-4ubuntu1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"idn","binary_version":"1.38-4ubuntu1.1"},{"binary_version":"1.38-4ubuntu1.1","binary_name":"libidn12"}]},"database_specific":{"cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-57053"}],"ecosystem":"Ubuntu:22.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8521-1.json"}},{"package":{"name":"libidn","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libidn?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.42-1ubuntu0.1"}]}],"versions":["1.41-1","1.42-1","1.42-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.42-1ubuntu0.1","binary_name":"idn"},{"binary_name":"libidn12","binary_version":"1.42-1ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2026-57053","severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:24.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8521-1.json"}},{"package":{"name":"libidn","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libidn?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.43-2ubuntu0.26.04.1"}]}],"versions":["1.43-2","1.43-2build1"],"ecosystem_specific":{"binaries":[{"binary_name":"idn","binary_version":"1.43-2ubuntu0.26.04.1"},{"binary_name":"libidn12","binary_version":"1.43-2ubuntu0.26.04.1"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:26.04:LTS","cves":[{"id":"CVE-2026-57053","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8521-1.json"}}],"schema_version":"1.7.5"}