Excessive Permissions in Submariner-Operator Affecting Red Hat Cluster Management
CVE-2026-66780

9.9CRITICAL

Key Information:

Vendor

Red Hat
Status
Red Hat Advanced Cluster Management For Kubernetes 2
Vendor
CVE Published:
18 August 2026

What is CVE-2026-66780?

A vulnerability exists within the submariner-operator component where the submariner-k8s-broker-cluster Role is granted excessive permissions. This flaw potentially allows a compromised cluster to impact network settings by overwriting endpoint information of other clusters. As a result, an attacker can manipulate inter-cluster tunnel traffic, posing risks for Man-in-the-Middle (MITM) attacks throughout the entire cluster mesh.

References

https://access.redhat.com/security/cve/CVE-2026-66780
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2507524
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
9.9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.