CVE-2026-44283

Description

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.

How to fix CVE-2026-44283

To remediate CVE-2026-44283, upgrade the affected package to a fixed version below.

• —upgrade to 3.4.44 or later
• —no fix listed
• —upgrade to 3.4.44 or later
• —upgrade to 3.6.11 or later

Is CVE-2026-44283 being exploited?

Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.

Affected packages (4)

• from 0, < 3.4.44, >= 3.5.0, < 3.5.30, >= 3.6.0, < 3.6.11
• from 0
• from 0, < 3.4.44
• >= 3.6.0, < 3.6.11

CVSS scores

References (4)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-44283
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2026-44283
• PATCHgithub.com/etcd-io/etcd
• WEBgithub.com/etcd-io/etcd/security/advisories/GHSA-x35m-3gp4-4fh5