Description
A flaw was found in the Submariner operator. This vulnerability allows for the exposure of a long-lived broker service account (SA) bearer token within the Submariner Custom Resource (CR) specification. An attacker with access to the cluster's etcd database or through `kubectl get` commands could obtain this token. The possession of this token grants full control over the mesh network, enabling unauthorized management of network resources such as endpoints and secrets.
Published: 2026-08-18
Score: 5.8 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

A flaw in the Submariner operator allows the broker service account bearer token to be stored in cleartext within the Submariner Custom Resource specification. When an attacker obtains read access to the cluster’s etcd database or uses kubectl get on the CR, they can retrieve this token. The token grants full control over the mesh network, enabling manipulation of endpoints and secrets. This vulnerability is classified as CWE-312, representing improper handling of sensitive data in plaintext, and involves improper authorization as described by CWE-269.

Affected Systems

Red Hat Advanced Cluster Management for Kubernetes 2

Risk and Exploitability

The CVSS score of 5.8 indicates moderate severity, while the EPSS score is less than 1% and the vulnerability is not listed in the CISA KEV catalog, suggesting no known active exploitation but moderate risk. Likely attack vectors involve attackers who can read etcd or perform kubectl get commands. Possession of the exposed token facilitates unauthorized mesh command execution and deep network misconfiguration.

Generated by OpenCVE AI on September 2, 2026 at 06:43 UTC.

Remediation

Vendor Workaround

To mitigate this issue, ensure that access to Submariner Custom Resources (CRs) is strictly controlled. Implement Kubernetes Role-Based Access Control (RBAC) policies to limit read access to Submariner CRs only to authorized administrators and components that explicitly require it. This reduces the risk of unauthorized disclosure of the broker Service Account bearer token, which may be stored in cleartext within the CR's specification field. Review existing RBAC configurations to ensure least privilege is applied to resources containing sensitive information.

OpenCVE Recommended Actions

  • Review and tighten Kubernetes RBAC policies to restrict read access to Submariner Custom Resources to only authorized administrators and components that require it.
  • Audit and monitor access to etcd and custom resources to detect unauthorized reads or modifications.
  • Regenerate the broker service account token, recreate the Submariner Custom Resource without embedding the token in cleartext, and store the token securely in a Kubernetes Secret accessible only to trusted components.

Generated by OpenCVE AI on September 2, 2026 at 06:43 UTC.

Tracking

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Advisories

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History

Thu, 03 Sep 2026 05:00:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:acm:2.17::el9
References

Tue, 01 Sep 2026 22:00:00 +0000

Type Values Removed Values Added
Title Submariner-operator: submariner-operator: broker api bearer token stored cleartext in cr spec Submariner-operator: operator clusterrole grants cluster-wide create/update on all configmaps
Weaknesses CWE-269
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

 cvssV3_1

{'score': 5.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N'}

Fri, 21 Aug 2026 21:15:00 +0000

Type Values Removed Values Added
First Time appeared Redhat advanced Cluster Management For Kubernetes
Vendors & Products Redhat advanced Cluster Management For Kubernetes

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 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

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

Type Values Removed Values Added
Description A flaw was found in the Submariner operator. This vulnerability allows for the exposure of a long-lived broker service account (SA) bearer token within the Submariner Custom Resource (CR) specification. An attacker with access to the cluster's etcd database or through `kubectl get` commands could obtain this token. The possession of this token grants full control over the mesh network, enabling unauthorized management of network resources such as endpoints and secrets.
Title Submariner-operator: submariner-operator: broker api bearer token stored cleartext in cr spec
First Time appeared Redhat
Redhat acm
Weaknesses CWE-312
CPEs cpe:/a:redhat:acm:2
Vendors & Products Redhat
Redhat acm
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Subscriptions

Redhat Acm Advanced Cluster Management For Kubernetes
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-09-03T04:41:22.302Z

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

Link: CVE-2026-66782

cve-icon Vulnrichment

Updated: 2026-08-18T19:47:53.599Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-08-18T17:17:00.710

Modified: 2026-09-03T13:06:00.497

Link: CVE-2026-66782

cve-icon Redhat

Severity : Important

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

Links: CVE-2026-66782 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-02T06:45:05Z

Weaknesses
  • CWE-269

    Improper Privilege Management

  • CWE-312

    Cleartext Storage of Sensitive Information