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.
Published: 2026-08-20
Score: 9.9 Critical
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Workaround

To mitigate this issue, restrict the ability of untrusted tenants to create `HelmRelease` custom resources within the cluster. Implement strict Role-Based Access Control (RBAC) policies to limit which users or service accounts can create or modify `HelmRelease` objects. This will prevent unauthorized users from leveraging the controller's elevated privileges for cluster-wide resource deployment.

Tracking

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Advisories

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History

Thu, 20 Aug 2026 20:45:00 +0000

Type Values Removed Values Added
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.
Title Multicloud-operators-subscription: multicloud-operators-subscription: helmrelease chart applied with controller sa without gvk or namespace restriction
First Time appeared Redhat
Redhat acm
Weaknesses CWE-441
CPEs cpe:/a:redhat:acm:2
Vendors & Products Redhat
Redhat acm
References
Metrics cvssV3_1

{'score': 9.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-08-20T20:34:10.321Z

Reserved: 2026-08-11T17:40:07.959Z

Link: CVE-2026-67567

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-20T21:17:07.403

Modified: 2026-08-20T21:17:07.403

Link: CVE-2026-67567

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses