CVE-2026-44283 PUBLISHED

etcd: Read access via PrevKv in etcd transactions may bypass RBAC authorization checks

Assigner: GitHub_M
Reserved: 05.05.2026 Published: 14.05.2026 Updated: 14.05.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
CVSS Score: 0

Product Status

Vendor etcd-io
Product etcd
Versions
  • Version < 3.4.44 is affected
  • Version >= 3.5.0, <= 3.5.29 is affected
  • Version >= 3.6.0, <= 3.6.10 is affected

References

Problem Types

  • CWE-863: Incorrect Authorization CWE