CVE-2026-66780
Description
A flaw was found in the submariner-operator component. The submariner-k8s-broker-cluster Role, which is assigned to joined clusters, possesses excessive permissions. This allows a compromised cluster to alter network configurations, specifically by overwriting other clusters' endpoint information. Consequently, an attacker can redirect inter-cluster tunnel traffic, enabling a Man-in-the-Middle (MITM) attack across the entire cluster mesh.
Déclaration
Critical: Red Hat Advanced Cluster Management for Kubernetes is vulnerable to a critical flaw in the submariner-operator where a compromised spoke cluster can achieve a Man-in-the-Middle (MITM) attack across the entire cluster mesh. This is due to the submariner-k8s-broker-cluster Role granting overly broad permissions, allowing any joined cluster to modify endpoint configurations for all other clusters within the broker namespace. This broad access enables an attacker to redirect inter-cluster tunnel traffic.
Mesure d'atténuation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Détails du score du système commun d'évaluation des vulnérabilités (CVSS)
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).
Les mesures et les scores CVSS suivants sont préliminaires et sujets à révision.
Répartition des scores CVSS v3
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Score de base | 9.9 | N/A | 9.9 |
| Vecteur d'attaque | Network | N/A | Network |
| Complexité de l'attaque | Low | N/A | Low |
| Privilèges requis | Low | N/A | Low |
| Interaction avec l'utilisateur | None | N/A | None |
| Champ d'application | Changed | N/A | Changed |
| Confidentialité | High | N/A | High |
| Impact sur l'intégrité | High | N/A | High |
| Impact sur la disponibilité | High | N/A | High |
Vecteur
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Comprendre la Défaillance (CWE)
Other
Technical Impact: Varies by Context
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