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.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

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.

History

Tue, 18 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Tue, 18 Aug 2026 17:45:00 +0000

Type Values Removed Values Added
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.
Title Submariner-operator: submariner-operator: flat broker trust model grants every spoke full crud on all endpoints, secrets, and endpointslices in broker namespace
First Time appeared Redhat
Redhat acm
Weaknesses CWE-284
CPEs cpe:/a:redhat:acm:2
Vendors & Products Redhat
Redhat acm
References
Metrics cvssV3_1

{'score': 9.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-08-18T18:45:01.220Z

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

Link: CVE-2026-66780

cve-icon Vulnrichment

Updated: 2026-08-18T18:44:56.550Z

cve-icon NVD

Status : Received

Published: 2026-08-18T18:19:23.940

Modified: 2026-08-18T19:17:00.697

Link: CVE-2026-66780

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-18T18:30:16Z

Weaknesses