Critical severity · published Aug 17, 2026
CVE-2026-66792
Multicloud-operators-subscription: multicloud-operators-subscription: isclusteradmin() trusts user-settable annotations on managed clusters
9.9
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MG
Multicluster Global Hub 1.4.9 · Red Hat
All versions, or not specified · source: vendor
MG
Multicluster Global Hub 1.5.8 · Red Hat
All versions, or not specified · source: vendor
MG
Multicluster Global Hub 1.6.6 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Advanced Cluster Management for Kubernetes 2.11 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Advanced Cluster Management for Kubernetes 2.13 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Advanced Cluster Management for Kubernetes 2.14 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Advanced Cluster Management for Kubernetes 2.15 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Advanced Cluster Management for Kubernetes 2.16 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Advanced Cluster Management for Kubernetes 2.17 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat OpenShift Container Platform 4 · Red Hat
All versions, or not specified · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-66792
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-66792
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:60386
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:60387
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:60388
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:60389
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:60390
vendor-advisory
https://access.redhat.com/errata/RHSA-2026:60391
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