CVE-2026-4740
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Rhacm: open cluster management (ocm): cross-cluster privilege escalation via improper kubernetes client certificate renewal validation
A flaw was found in Open Cluster Management (OCM), the technology underlying Red Hat Advanced Cluster Management (ACM). Improper validation of Kubernetes client certificate renewal allows a managed cluster administrator to forge a client certificate that can be approved by the OCM controller. This enables cross-cluster privilege escalation and may allow an attacker to gain control over other managed clusters, including the hub cluster.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
multicluster engine for Kubernetes 2.1
- Vendor
- Red Hat
- Product
- multicluster engine for Kubernetes 2.1
- Platforms
- Unknown
- Default status
affected- Package
- multicluster-engine/registration-rhel9
- Package collection
- https://catalog.redhat.com/software/containers/
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 1776881164 | unaffected | rpm | * | Unavailable | None listed |
multicluster engine for Kubernetes 2.11
- Vendor
- Red Hat
- Product
- multicluster engine for Kubernetes 2.11
- Platforms
- Unknown
- Default status
affected- Package
- multicluster-engine/registration-rhel9
- Package collection
- https://catalog.redhat.com/software/containers/
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 1777478390 | unaffected | rpm | * | Unavailable | None listed |
multicluster engine for Kubernetes 2.6
- Vendor
- Red Hat
- Product
- multicluster engine for Kubernetes 2.6
- Platforms
- Unknown
- Default status
affected- Package
- multicluster-engine/registration-rhel9
- Package collection
- https://catalog.redhat.com/software/containers/
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 1775977180 | unaffected | rpm | * | Unavailable | None listed |
multicluster engine for Kubernetes 2.8
- Vendor
- Red Hat
- Product
- multicluster engine for Kubernetes 2.8
- Platforms
- Unknown
- Default status
affected- Package
- multicluster-engine/registration-rhel9
- Package collection
- https://catalog.redhat.com/software/containers/
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 1775638726 | unaffected | rpm | * | Unavailable | None listed |
multicluster engine for Kubernetes 2.9
- Vendor
- Red Hat
- Product
- multicluster engine for Kubernetes 2.9
- Platforms
- Unknown
- Default status
affected- Package
- multicluster-engine/registration-rhel9
- Package collection
- https://catalog.redhat.com/software/containers/
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 1776445095 | unaffected | rpm | * | Unavailable | None listed |
Multicluster Engine for Kubernetes
- Vendor
- Red Hat
- Product
- Multicluster Engine for Kubernetes
- Platforms
- Unknown
- Default status
unknown- Package
- multicluster-engine/addon-manager-rhel9
- Package collection
- https://access.redhat.com/downloads/content/package-browser/
No explicit version tuples; consult this entry's default status.
Multicluster Engine for Kubernetes
- Vendor
- Red Hat
- Product
- Multicluster Engine for Kubernetes
- Platforms
- Unknown
- Default status
unknown- Package
- multicluster-engine/maestro-rhel9
- Package collection
- https://access.redhat.com/downloads/content/package-browser/
No explicit version tuples; consult this entry's default status.
Multicluster Engine for Kubernetes
- Vendor
- Red Hat
- Product
- Multicluster Engine for Kubernetes
- Platforms
- Unknown
- Default status
unknown- Package
- multicluster-engine/managedcluster-import-controller-rhel9
- Package collection
- https://access.redhat.com/downloads/content/package-browser/
No explicit version tuples; consult this entry's default status.
Multicluster Engine for Kubernetes
- Vendor
- Red Hat
- Product
- Multicluster Engine for Kubernetes
- Platforms
- Unknown
- Default status
unknown- Package
- multicluster-engine/placement-rhel9
- Package collection
- https://access.redhat.com/downloads/content/package-browser/
No explicit version tuples; consult this entry's default status.
Multicluster Engine for Kubernetes
- Vendor
- Red Hat
- Product
- Multicluster Engine for Kubernetes
- Platforms
- Unknown
- Default status
unknown- Package
- multicluster-engine/registration-operator-rhel9
- Package collection
- https://access.redhat.com/downloads/content/package-browser/
No explicit version tuples; consult this entry's default status.
Multicluster Engine for Kubernetes
- Vendor
- Red Hat
- Product
- Multicluster Engine for Kubernetes
- Platforms
- Unknown
- Default status
unknown- Package
- multicluster-engine/work-rhel9
- Package collection
- https://access.redhat.com/downloads/content/package-browser/
No explicit version tuples; consult this entry's default status.