---
cve: "CVE-2026-66780"
severity: "CRITICAL"
cvss: 9.9
epss: "24%"
vendor: "Generic Security"
kev: false
exploited: false
published: "2026-08-18 18:19:23"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T05:39:05+02:00"
---

# CVE-2026-66780

> 9.9 CRITICAL

## Beschreibung

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-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Referenzen

- <https://access.redhat.com/security/cve/CVE-2026-66780>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2507524>
- <https://access.redhat.com/errata/RHSA-2026:63016>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-66780) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_