A flaw was found in the `submariner-operator` component of Red Hat Advanced Cluster Management for Kubernetes. This vulnerability allows a cluster administrator, or any user with permissions to modify the Submariner Custom Resource (CR), to specify an unvalidated image path. This lack of validation enables an attacker to execute arbitrary code with elevated privileges across the entire cluster, including control-plane nodes, by deploying a malicious image.

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Fixes

Solution

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Workaround

To mitigate this issue, restrict access to cluster-admin roles and carefully control permissions for users or service accounts that can modify Submariner Custom Resources. Ensure that only trusted and authorized personnel have the ability to patch Submariner CRs, thereby preventing the injection of malicious images.

History

Wed, 19 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 19 Aug 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Tue, 18 Aug 2026 17:15:00 +0000

Type Values Removed Values Added
Description A flaw was found in the `submariner-operator` component of Red Hat Advanced Cluster Management for Kubernetes. This vulnerability allows a cluster administrator, or any user with permissions to modify the Submariner Custom Resource (CR), to specify an unvalidated image path. This lack of validation enables an attacker to execute arbitrary code with elevated privileges across the entire cluster, including control-plane nodes, by deploying a malicious image.
Title Submariner-operator: submariner-operator: arbitrary image override enables privileged code execution on every node
First Time appeared Redhat
Redhat acm
Weaknesses CWE-20
CPEs cpe:/a:redhat:acm:2
Vendors & Products Redhat
Redhat acm
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-08-19T15:04:44.821Z

Reserved: 2026-07-27T17:51:24.885Z

Link: CVE-2026-66783

cve-icon Vulnrichment

Updated: 2026-08-19T15:04:39.637Z

cve-icon NVD

Status : Received

Published: 2026-08-18T17:17:00.840

Modified: 2026-08-19T15:17:50.873

Link: CVE-2026-66783

cve-icon Redhat

Severity : Important

Publid Date: 2026-08-18T16:35:00Z

Links: CVE-2026-66783 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-18T19:00:12Z

Weaknesses