MEDIUM 5.4 Microsoft
CVE-2026-33343
etcd: Nested etcd transactions bypass RBAC authorization checks
Microsoft Security Update 2026-Mar: etcd: Nested etcd transactions bypass RBAC authorization checks
Affected Products
- cbl2 etcd 3.5.21-4 on CBL Mariner 2.0
- azl3 etcd 3.5.21-1 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33343
- https://nvd.nist.gov/vuln/detail/CVE-2026-33343
This medium severity vulnerability with a CVSS score of 5.4 was published on 2026-03-10 via Microsoft. Affected: cbl2 etcd 3.5.21-4 on CBL Mariner 2.0, azl3 etcd 3.5.21-1 on Azure Linux 3.0.
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