{"id":"UBUNTU-CVE-2026-44283","details":"etcd is a distributed key-value store for the data of a distributed system. Prior to 3.4.44, 3.5.30, and 3.6.11, a vulnerability in etcd allows read access via PrevKv, or lease attachment in Put requests within transaction operations, to bypass RBAC authorization checks. An authenticated user without sufficient read or lease-related permissions may be able to access unauthorized data or attach leases by invoking transaction operations with these features enabled. This vulnerability is fixed in 3.4.44, 3.5.30, and 3.6.11.","modified":"2026-07-02T18:03:14.162249293Z","published":"2026-05-14T18:16:00Z","upstream":["CVE-2026-44283"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-44283"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-44283"},{"type":"REPORT","url":"https://github.com/etcd-io/etcd/security/advisories/GHSA-x35m-3gp4-4fh5"}],"affected":[{"package":{"name":"etcd","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/etcd?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.0+dfsg-2","2.2.1+dfsg-1","2.2.2+dfsg-1","2.2.2+dfsg-2","2.2.3+dfsg-1","2.2.5+dfsg-1","2.2.5+dfsg-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.2.5+dfsg-1ubuntu1","binary_name":"etcd"},{"binary_name":"golang-etcd-server-dev","binary_version":"2.2.5+dfsg-1ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44283.json"}},{"package":{"name":"etcd","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/etcd?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.0-1","3.2.9+dfsg-2","3.2.9+dfsg-3","3.2.17+dfsg-1","3.2.17+dfsg-1ubuntu0.1~esm1","3.2.17+dfsg-1ubuntu0.1","3.2.17+dfsg-1ubuntu0.1+esm1","3.2.17+dfsg-1ubuntu0.1+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"etcd","binary_version":"3.2.17+dfsg-1ubuntu0.1+esm2"},{"binary_name":"etcd-client","binary_version":"3.2.17+dfsg-1ubuntu0.1+esm2"},{"binary_name":"etcd-server","binary_version":"3.2.17+dfsg-1ubuntu0.1+esm2"},{"binary_name":"golang-etcd-server-dev","binary_version":"3.2.17+dfsg-1ubuntu0.1+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44283.json"}},{"package":{"name":"etcd","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/etcd?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.26+dfsg-3","3.2.26+dfsg-4","3.2.26+dfsg-6","3.2.26+dfsg-6ubuntu0.1","3.2.26+dfsg-6ubuntu0.2","3.2.26+dfsg-6ubuntu0.2+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"etcd","binary_version":"3.2.26+dfsg-6ubuntu0.2+esm1"},{"binary_name":"etcd-client","binary_version":"3.2.26+dfsg-6ubuntu0.2+esm1"},{"binary_name":"etcd-server","binary_version":"3.2.26+dfsg-6ubuntu0.2+esm1"},{"binary_name":"golang-etcd-server-dev","binary_version":"3.2.26+dfsg-6ubuntu0.2+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44283.json"}},{"package":{"name":"etcd","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/etcd?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.25+dfsg-6","3.3.25+dfsg-7","3.3.25+dfsg-7ubuntu0.22.04.1","3.3.25+dfsg-7ubuntu0.22.04.1+esm1","3.3.25+dfsg-7ubuntu0.22.04.2","3.3.25+dfsg-7ubuntu0.22.04.2+esm1","3.3.25+dfsg-7ubuntu0.22.04.2+esm2","3.3.25+dfsg-7ubuntu0.22.04.2+esm3"],"ecosystem_specific":{"binaries":[{"binary_version":"3.3.25+dfsg-7ubuntu0.22.04.2+esm3","binary_name":"etcd"},{"binary_version":"3.3.25+dfsg-7ubuntu0.22.04.2+esm3","binary_name":"etcd-client"},{"binary_name":"etcd-server","binary_version":"3.3.25+dfsg-7ubuntu0.22.04.2+esm3"},{"binary_name":"golang-etcd-server-dev","binary_version":"3.3.25+dfsg-7ubuntu0.22.04.2+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44283.json"}},{"package":{"name":"etcd","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/etcd?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.23-4ubuntu2","3.4.30-1","3.4.30-1build1","3.4.30-1ubuntu0.24.04.1","3.4.30-1ubuntu0.24.04.2","3.4.30-1ubuntu0.24.04.2+esm1","3.4.30-1ubuntu0.24.04.3","3.4.30-1ubuntu0.24.04.3+esm1","3.4.30-1ubuntu0.24.04.3+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"etcd-client","binary_version":"3.4.30-1ubuntu0.24.04.3+esm2"},{"binary_name":"etcd-server","binary_version":"3.4.30-1ubuntu0.24.04.3+esm2"},{"binary_name":"golang-etcd-server-dev","binary_version":"3.4.30-1ubuntu0.24.04.3+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44283.json"}},{"package":{"name":"etcd","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/etcd?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.5.16-4"],"ecosystem_specific":{"binaries":[{"binary_version":"3.5.16-4","binary_name":"etcd-client"},{"binary_name":"etcd-server","binary_version":"3.5.16-4"},{"binary_version":"3.5.16-4","binary_name":"golang-etcd-server-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-202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