CRITICALVulnerability
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NVD CRITICAL: CVE-2026-66780 — A flaw was found in the submariner-operator component. The `submariner-k8s-broke...

·Source: NIST NVD

Updated:

Executive 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 (

Analysis

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. CVSS Score: 9.9. Published: 2026-08-18T18:19:23.940.

Indicators of Compromise (1)

CVE (1)
CVE-2026-66780
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Aug 18, 2026. Verified by: NIST.

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