Improper access control in etcd - CVE-2026-44283
Published: May 5, 2026
Vulnerability identifier: #VU130109
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-44283
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to access unauthorized data.
The vulnerability exists due to improper access control in transaction operations when processing Put requests with PrevKv enabled. A remote attacker can send a specially crafted transaction request to access unauthorized data.
Kubernetes deployments that rely on the API server for authentication and authorization are not affected.
Affected software
etcd
How to mitigate CVE-2026-44283
Install security update from vendor's website.
etcd - addressed in versions 3.4.44, 3.5.30, 3.6.11