{"id":"UBUNTU-CVE-2026-6732","details":"A flaw was found in libxml2. This vulnerability occurs when the library processes a specially crafted XML Schema Definition (XSD) validated document that includes an internal entity reference. An attacker could exploit this by providing a malicious document, leading to a type confusion error that causes the application to crash. This results in a denial of service (DoS), making the affected system or application unavailable.","modified":"2026-06-23T00:30:07.245942764Z","published":"2026-04-23T23:16:00Z","related":["USN-8460-1"],"upstream":["CVE-2026-6732"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-6732"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-6732"},{"type":"REPORT","url":"https://gitlab.gnome.org/GNOME/libxml2/-/issues/1097"},{"type":"REPORT","url":"https://gitlab.gnome.org/GNOME/libxml2/-/merge_requests/411"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8460-1"}],"affected":[{"package":{"name":"libxml2","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libxml2?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.14.5+dfsg-0.2ubuntu0.2"}]}],"versions":["2.12.7+dfsg+really2.9.14-0.4","2.12.7+dfsg+really2.9.14-0.4ubuntu0.1","2.12.7+dfsg+really2.9.14-1","2.14.3+dfsg-0exp1","2.14.3+dfsg-0exp2","2.14.3+dfsg-0exp3","2.14.4+dfsg-0exp1","2.14.5+dfsg-0exp1","2.14.5+dfsg-0exp2","2.14.5+dfsg-0.1","2.14.5+dfsg-0.2","2.14.5+dfsg-0.2ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libxml2-16","binary_version":"2.14.5+dfsg-0.2ubuntu0.2"},{"binary_name":"libxml2-utils","binary_version":"2.14.5+dfsg-0.2ubuntu0.2"},{"binary_name":"python3-libxml2","binary_version":"2.14.5+dfsg-0.2ubuntu0.2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-6732.json"}},{"package":{"name":"libxml2","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libxml2?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.15.2+dfsg-0.1ubuntu0.1"}]}],"versions":["2.14.5+dfsg-0.2","2.14.5+dfsg-0.2build1","2.15.1+dfsg-0.3","2.15.1+dfsg-0.4","2.15.1+dfsg-1","2.15.1+dfsg-2","2.15.1+dfsg-2ubuntu1","2.15.1+dfsg-2ubuntu2","2.15.2+dfsg-0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libxml2-16","binary_version":"2.15.2+dfsg-0.1ubuntu0.1"},{"binary_name":"libxml2-source","binary_version":"2.15.2+dfsg-0.1ubuntu0.1"},{"binary_name":"libxml2-utils","binary_version":"2.15.2+dfsg-0.1ubuntu0.1"},{"binary_name":"python3-libxml2","binary_version":"2.15.2+dfsg-0.1ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-6732.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}