CVE-2026-66792

CRITICAL 9.9

Multicloud-operators-subscription: multicloud-operators-subscription: isclusteradmin() trusts user-settable annotations on managed clusters

CVSS Score

9.9

EPSS Score

0.7%

EPSS Percentile

51th

A flaw was found in the multicloud-operators-subscription component. This vulnerability allows a user on a managed cluster to escalate their privileges by creating a Subscription with specific, crafted annotations. Successful exploitation grants the attacker the ability to deploy resources into any namespace with the elevated permissions of the controller's Service Account, potentially leading to unauthorized access and control over cluster resources.

CWE	CWE-863
Vendor	red hat
Product	multicluster global hub 1.4.9
Published	Aug 17, 2026
Last Updated	Sep 29, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Red Hat / Multicluster Global Hub 1.4.9

All versions affected

Red Hat / Multicluster Global Hub 1.4.9

All versions affected

Red Hat / Multicluster Global Hub 1.4.9

All versions affected

Red Hat / Multicluster Global Hub 1.5.8

All versions affected

Red Hat / Multicluster Global Hub 1.5.8

All versions affected

Red Hat / Multicluster Global Hub 1.5.8

All versions affected

Red Hat / Multicluster Global Hub 1.6.6

All versions affected

Red Hat / Multicluster Global Hub 1.6.6

All versions affected

Red Hat / Multicluster Global Hub 1.6.6

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2.11

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2.11

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2.13

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2.13

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2.14

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2.14

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2.15

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2.15

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2.16

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2.16

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2.17

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2.17

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2

All versions affected

Red Hat / Red Hat Advanced Cluster Management for Kubernetes 2

All versions affected