CVE-2026-44283: Etcd

Medium severity, CVSS 4.3. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Etcd Etcd: before 3.4.44 (fixed in 3.4.44); from 3.5.0, before 3.5.30 (fixed in 3.5.30); from 3.6.0, before 3.6.11 (fixed in 3.6.11)

Published 2026-05-14. Last modified 2026-06-17.