CVE-2026-66780 (GCVE-0-2026-66780)
Vulnerability from cvelistv5
Published
2026-08-18 17:32
Modified
2026-08-27 02:15
Severity ?
9.9 (Critical) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE
  • CWE-284 - Improper Access Control
Summary
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.
References
https://access.redhat.com/errata/RHSA-2026:60386 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60387 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60388 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60389 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60390 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:60391 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-66780 vdb-entry, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2507524 issue-tracking, x_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.11 Unaffected: 1787689013   < *
    cpe:/a:redhat:acm:2.11::el9
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