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CVE-2026-66792— Multicloud-operators-subscription: multicloud-operators-subscription: isclusteradmin() trusts user-settable annotations on managed clusters

Quick assessment

Affected
Red Hat Multicluster Global Hub 1.4.9
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Open Cluster Management multicloud-operators-subscription是Open Cluster Management组织的一款支持多云环境订阅管理的企业云平台组件。 Open Cluster Management multicloud-operators-subscription存在授权问题漏洞，该漏洞源于multicloud-operators-subscription组件允许受管集群上的用户通过创建带有特定特制注释的Subscription提升权限，成功利

CVSS 9.9 · Critical EPSS 0.69% · P52

Affected Version Matrix 38

VendorProduct Version RangeStatus
Red Hat Multicluster Global Hub 1.4.9 1788355439< * unaffected
1788355599< * unaffected
1788355417< * unaffected
Red Hat Multicluster Global Hub 1.5.8 1789515408< * unaffected
1789515288< * unaffected
1789478830< * unaffected
Red Hat Multicluster Global Hub 1.6.6 1790085494< * unaffected
1790086176< * unaffected
1790085268< * unaffected
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 any unaffected
any unaffected
any unaffected
any unaffected
any unaffected
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.11 1787262214< * unaffected
1787263584< * unaffected
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.13 1787259284< * unaffected
1787263693< * unaffected
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.14 1786976940< * unaffected
1787170830< * unaffected
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.15 1787238598< * unaffected
1787240030< * unaffected
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.16 1787242135< * unaffected
1787242321< * unaffected
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 1787242131< * unaffected
1787242108< * unaffected
Red Hat Red Hat OpenShift Container Platform 4 any affected
any unaffected
any unaffected
any unaffected
any unaffected
any unaffected
any unaffected
any unaffected
… +1 more rows
Red Hat Red Hat Openshift Data Foundation 4 any unaffected
any unaffected
any unaffected
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I. Basic Information for CVE-2026-66792

Vulnerability Information
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Vulnerability Title
Multicloud-operators-subscription: multicloud-operators-subscription: isclusteradmin() trusts user-settable annotations on managed clusters
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Open Cluster Management multicloud-operators-subscription 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open Cluster Management multicloud-operators-subscription是Open Cluster Management组织的一款支持多云环境订阅管理的企业云平台组件。 Open Cluster Management multicloud-operators-subscription存在授权问题漏洞，该漏洞源于multicloud-operators-subscription组件允许受管集群上的用户通过创建带有特定特制注释的Subscription提升权限，成功利
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Multicluster Global Hub 1.4.9 1788355439 ~ * cpe:/a:redhat:multicluster_globalhub:1.4::el9
Red Hat Multicluster Global Hub 1.4.9 1788355599 ~ * cpe:/a:redhat:multicluster_globalhub:1.4::el9
Red Hat Multicluster Global Hub 1.4.9 1788355417 ~ * cpe:/a:redhat:multicluster_globalhub:1.4::el9
Red Hat Multicluster Global Hub 1.5.8 1789515408 ~ * cpe:/a:redhat:multicluster_globalhub:1.5::el9
Red Hat Multicluster Global Hub 1.5.8 1789515288 ~ * cpe:/a:redhat:multicluster_globalhub:1.5::el9
Red Hat Multicluster Global Hub 1.5.8 1789478830 ~ * cpe:/a:redhat:multicluster_globalhub:1.5::el9
Red Hat Multicluster Global Hub 1.6.6 1790085494 ~ * cpe:/a:redhat:multicluster_globalhub:1.6::el9
Red Hat Multicluster Global Hub 1.6.6 1790086176 ~ * cpe:/a:redhat:multicluster_globalhub:1.6::el9
Red Hat Multicluster Global Hub 1.6.6 1790085268 ~ * cpe:/a:redhat:multicluster_globalhub:1.6::el9
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.11 1787262214 ~ * cpe:/a:redhat:acm:2.11::el9
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.11 1787263584 ~ * cpe:/a:redhat:acm:2.11::el9
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.13 1787259284 ~ * cpe:/a:redhat:acm:2.13::el9
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.13 1787263693 ~ * cpe:/a:redhat:acm:2.13::el9
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.14 1786976940 ~ * cpe:/a:redhat:acm:2.14::el9
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.14 1787170830 ~ * cpe:/a:redhat:acm:2.14::el9
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.15 1787238598 ~ * cpe:/a:redhat:acm:2.15::el9
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.15 1787240030 ~ * cpe:/a:redhat:acm:2.15::el9
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.16 1787242135 ~ * cpe:/a:redhat:acm:2.16::el9
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.16 1787242321 ~ * cpe:/a:redhat:acm:2.16::el9
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 1787242131 ~ * cpe:/a:redhat:acm:2.17::el9
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 1787242108 ~ * cpe:/a:redhat:acm:2.17::el9
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 - cpe:/a:redhat:acm:2
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 - cpe:/a:redhat:acm:2
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 - cpe:/a:redhat:acm:2
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 - cpe:/a:redhat:acm:2
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 - cpe:/a:redhat:acm:2
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-66792

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III. Intelligence Information for CVE-2026-66792

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Vendor Advisories for CVE-2026-66792 (11)

Same Patch Batch · Red Hat · 2026-08-17 · 4 CVEs total

CVE-2026-66795 9.9 CRITICAL Managedcluster-import-controller: csr auto-approver does not validate certificate subject
CVE-2026-71472 9.1 CRITICAL Acm-search-v2-rhel9: search-v2-operator: shell-command and sql injection in postgresql-sta
CVE-2026-70495 8.8 HIGH Search-v2-operator: search-v2-operator: cluster-wide impersonate on users/groups shared ac

IV. Related Vulnerabilities

Same product: Multicluster Global Hub 1.4.9
Same vendor: Red Hat
Same weakness: CWE-863

V. Comments for CVE-2026-66792

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