{"id":"USN-8230-1","summary":"docker.io-app vulnerabilities","details":"It was discovered that BuildKit, contained within Docker, incorrectly\nhandled file path validation when processing frontend API messages. An\nattacker could possibly use this issue to write files outside of the\nintended state directory. (CVE-2026-33747)\n\nIt was discovered that BuildKit, contained within Docker, incorrectly\nvalidated the subdir component of Git URL fragments. An attacker could\npossibly use this issue to access files outside of the checked-out\nrepository root. (CVE-2026-33748)","modified":"2026-05-07T14:14:22.073092095Z","published":"2026-05-06T03:28:52Z","related":["UBUNTU-CVE-2026-33747","UBUNTU-CVE-2026-33748"],"upstream":["CVE-2026-33747","CVE-2026-33748","UBUNTU-CVE-2026-33747","UBUNTU-CVE-2026-33748"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8230-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-33747"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-33748"}],"affected":[{"package":{"name":"docker.io-app","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/docker.io-app@26.1.3-0ubuntu1~20.04.1+esm2?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"26.1.3-0ubuntu1~20.04.1+esm2"}]}],"versions":["20.10.25-0ubuntu1~20.04.1","20.10.25-0ubuntu1~20.04.2","24.0.5-0ubuntu1~20.04.1","24.0.7-0ubuntu2~20.04.1","26.1.3-0ubuntu1~20.04.1","26.1.3-0ubuntu1~20.04.1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"docker.io","binary_version":"26.1.3-0ubuntu1~20.04.1+esm2"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8230-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:20.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-33747"},{"severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-33748"}]}}},{"package":{"name":"docker.io-app","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/docker.io-app@29.1.3-0ubuntu3~22.04.2?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"29.1.3-0ubuntu3~22.04.2"}]}],"versions":["20.10.25-0ubuntu1~22.04.1","20.10.25-0ubuntu1~22.04.2","24.0.5-0ubuntu1~22.04.1","24.0.7-0ubuntu2~22.04.1","26.1.3-0ubuntu1~22.04.1","27.5.1-0ubuntu3~22.04.1","27.5.1-0ubuntu3~22.04.2","28.2.2-0ubuntu1~22.04.1","29.1.3-0ubuntu3~22.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"docker.io","binary_version":"29.1.3-0ubuntu3~22.04.2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8230-1.json","cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-33747"},{"severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-33748"}]}}},{"package":{"name":"docker.io-app","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/docker.io-app@29.1.3-0ubuntu3~24.04.2?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"29.1.3-0ubuntu3~24.04.2"}]}],"versions":["24.0.5-0ubuntu1","24.0.7-0ubuntu1","24.0.7-0ubuntu2","24.0.7-0ubuntu3","24.0.7-0ubuntu4","24.0.7-0ubuntu4.1","26.1.3-0ubuntu1~24.04.1","27.5.1-0ubuntu3~24.04.1","27.5.1-0ubuntu3~24.04.2","28.2.2-0ubuntu1~24.04.1","29.1.3-0ubuntu3~24.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"docker.io","binary_version":"29.1.3-0ubuntu3~24.04.2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8230-1.json","cves_map":{"ecosystem":"Ubuntu:24.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-33747"},{"severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-33748"}]}}},{"package":{"name":"docker.io-app","ecosystem":"Ubuntu:26.04","purl":"pkg:deb/ubuntu/docker.io-app@29.1.3-0ubuntu4.1?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"29.1.3-0ubuntu4.1"}]}],"versions":["28.2.2-0ubuntu1","29.1.2-0ubuntu1","29.1.3-0ubuntu1","29.1.3-0ubuntu2","29.1.3-0ubuntu3","29.1.3-0ubuntu4"],"ecosystem_specific":{"binaries":[{"binary_name":"docker.io","binary_version":"29.1.3-0ubuntu4.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8230-1.json","cves_map":{"ecosystem":"Ubuntu:26.04","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-33747"},{"severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-33748"}]}}}],"schema_version":"1.7.5"}