Unauthenticated remote privilege escalation in a Microsoft Azure service (Azure Kubernetes Configuration Service) with CVSS 10.0; impacts widely used cloud infrastructure and can disrupt many organizations.
CVE-2026-83938
Unauthenticated remote privilege escalation in Azure Kubernetes Configuration Service
Is CVE-2026-83938 being exploited?
Not confirmed. CVE-2026-83938 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.71% probability of exploitation in the next 30 days.
How severe is CVE-2026-83938?
CVE-2026-83938 is rated Critical with a CVSS score of 10.0. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-83938?
Yes. A fix has been recorded for CVE-2026-83938. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-83938 affect?
CVE-2026-83938 affects Azure Kubernetes Configuration Service, AKS clusters using Config Service, Azure subscriptions using the Config service. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-83938?
Apply Microsoft advisory/patch and mitigations, restrict Config Service access, rotate credentials
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker can elevate privileges remotely to modify configurations, deploy workloads, and access secrets in affected Azure Kubernetes environments.
Immediate action required