CVE-2026-83938 Azure Kubernetes Configuration Service - Authentication Bypass

Azure Kubernetes Configuration Service contains a broken authentication caused by missing authentication for critical functions, letting unauthorized attackers elevate privileges over a network, exploit requires network access.

CVSS base score 10.0 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Published
22 October 2026
Updated
23 October 2026
Weakness
CWE-306

Vendor fix

Update to the latest version of Azure Kubernetes Configuration Service.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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