CVE-2026-66794
CriticalCVSS 9.3Summary
In the cluster-proxy-addon component of Multicluster Engine for Kubernetes, an unauthenticated attacker with access to the user-facing route can bypass authentication and authorization checks. By manipulating URL path segments, the attacker can proxy requests to arbitrary services across any managed cluster.
Risk Assessment
The vulnerability allows unauthorized access to internal services that should be protected, potentially leading to information disclosure or further compromise of the cluster environment.
Recommendation
Apply vendor patches and restrict access to the user-facing route to minimize the risk of exploitation.
Original NVD description (English source)
A flaw was found in the `cluster-proxy-addon` component of Multicluster Engine for Kubernetes. This vulnerability allows an unauthenticated attacker, who can access the user-facing route, to bypass authentication and authorization checks. By manipulating URL path segments, the attacker can proxy requests to arbitrary services across any managed cluster. This enables unauthorized access to internal services that would otherwise be protected, potentially leading to information disclosure or further compromise of the cluster environment.