CVE-2026-66782
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.
Statement
Important: In Red Hat Advanced Cluster Management for Kubernetes, the Submariner operator may allow sensitive broker ServiceAccount bearer tokens to be stored in cleartext within the Submariner Custom Resource (CR) specification. This configuration exposes the token to cluster administrators or any entity with read access to the CR, potentially granting full mesh control over the Submariner network. This risk is heightened by the token's long-lived nature and its exposure through standard Kubernetes tools like kubectl get and must-gather.
Mitigation
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.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.8 | N/A | 7.8 |
| Attack Vector | Local | N/A | Local |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | High | N/A | High |
| Integrity Impact | High | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Application Data
An attacker with access to the system could read sensitive information stored in cleartext (i.e., unencrypted). Even if the information is encoded in a way that is not human-readable, certain techniques could determine which encoding is being used, then decode the information.
Frequently Asked Questions
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