{"id":"CVE-2026-44283","aliases":["BIT-etcd-2026-44283","GHSA-x35m-3gp4-4fh5","GO-2026-5736"],"url":"https://o3.security/vulnerability/CVE-2026-44283","summary":"etcd: Read access via PrevKv in etcd transactions may bypass RBAC authorization checks","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.","published":"2026-05-14T17:01:33.598Z","modified":"2026-07-24T19:11:26.497636806Z","cvss":{"score":0,"severity":"NONE","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"go.etcd.io/etcd/v3","fixedVersion":"3.6.11"},{"ecosystem":"Go","name":"go.etcd.io/etcd/v3","fixedVersion":"3.5.30"},{"ecosystem":"Go","name":"go.etcd.io/etcd","fixedVersion":"3.4.44"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44283.json"},{"type":"ADVISORY","url":"https://github.com/etcd-io/etcd/security/advisories/GHSA-x35m-3gp4-4fh5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44283"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-24T19:11:26.497636806Z"}}