SEPTEMBER 17, 2026
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Case File

CVE-2026-66794

CRITICAL · CVSS 9.3 EPSS 0.41%

Source: NVD + CISA KEV + EPSS · Published 2026-08-19 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

A critical vulnerability exists in the `cluster-proxy-addon` component of the Multicluster Engine for Kubernetes, allowing unauthenticated attackers to bypass authentication and authorization checks via manipulated URL path segments. This flaw enables unauthorized access to internal services across managed clusters, posing significant risks of information disclosure and further compromise. Organizations utilizing Kubernetes, particularly those with exposed user-facing routes, should prioritize immediate remediation efforts.

CVE
CVE-2026-66794
Severity
CRITICAL
CVSS
9.3
EPSS
0.41%
Kubernetes

Original NVD Description

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.