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CVE-2026-66794

Medium

Elevated severity or exploit probability.

CVSS base
9.3 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
EPSS — probability of exploitation (30 days)
0.6%
47.5th percentile
CISA KEV
Not listed
Weakness / dates
CWE-918
Published 2026-08-19 · modified 2026-09-08

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.

References

Official: NVD · CVE.org