CVE-2026-44283

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

State: Published
Severity: 0.0 None
Published: May 14, 2026
Updated: May 16, 2026
Reserved: May 5, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	0.0 None	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N	GitHub_M

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
etcdetcd-io	< 3.4.44Affected >= 3.5.0, <= 3.5.29Affected >= 3.6.0, <= 3.6.10Affected

References

https://github.com/etcd-io/etcd/security/advisories/GHSA-x35m-3gp4-4fh5

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