What’s Vulnerable › Vulnerabilities
CVE-2026-67567: Multicloud-operators-subscription: multicloud-operators-subscription: helmrelease chart applied with controller sa without gvk or namespace restriction
- Severity: critical (CVSS 9.9 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-20 · updated 2026-10-26
- Weakness: CWE-441
Description
A flaw was found in the multicloud-operators-subscription component. This vulnerability allows a tenant, who has the ability to create HelmRelease custom resources (CRs), to bypass existing security controls. The system's HelmRelease controller processes Helm chart templates using its own elevated ServiceAccount privileges without proper validation. This enables the tenant to deploy arbitrary resources across the entire cluster, leading to a significant security compromise.
Affected products
- Red Hat Advanced Cluster Management for Kubernetes 2.11: all versions — fixed in 1787263584
- Red Hat Advanced Cluster Management for Kubernetes 2.13: all versions — fixed in 1787263693
- Red Hat Advanced Cluster Management for Kubernetes 2.14: all versions — fixed in 1787170830
- Red Hat Advanced Cluster Management for Kubernetes 2.15: all versions — fixed in 1787240030
- Red Hat Advanced Cluster Management for Kubernetes 2.16: all versions — fixed in 1787242321
- Red Hat Advanced Cluster Management for Kubernetes 2.17: all versions — fixed in 1787242108
How to fix
Upgrade to a fixed version: Red Hat Advanced Cluster Management for Kubernetes 2.11 1787263584; Red Hat Advanced Cluster Management for Kubernetes 2.13 1787263693; Red Hat Advanced Cluster Management for Kubernetes 2.14 1787170830; Red Hat Advanced Cluster Management for Kubernetes 2.15 1787240030; Red Hat Advanced Cluster Management for Kubernetes 2.16 1787242321; Red Hat Advanced Cluster Management for Kubernetes 2.17 1787242108. Check the vendor advisory for mitigations.
References
- https://access.redhat.com/errata/RHSA-2026:60386
- https://access.redhat.com/errata/RHSA-2026:60387
- https://access.redhat.com/errata/RHSA-2026:60388
- https://access.redhat.com/errata/RHSA-2026:60389
- https://access.redhat.com/errata/RHSA-2026:60390
- https://access.redhat.com/errata/RHSA-2026:60391
- https://access.redhat.com/security/cve/CVE-2026-67567
- https://bugzilla.redhat.com/show_bug.cgi?id=2514224
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