---
cve: "CVE-2026-73266"
severity: "HIGH"
cvss: 7.1
epss: "16%"
vendor: "Generic Security"
kev: false
exploited: false
published: "2026-08-13 17:17:35"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-07T00:49:11+02:00"
---

# CVE-2026-73266

> 7.1 HIGH

## Beschreibung

A flaw was found in the clusterclaims-controller component of Multicluster Engine (MCE). An authenticated tenant can exploit this vulnerability by manipulating ClusterClaim labels. This allows the tenant to force a cluster to join a ManagedClusterSet belonging to another tenant. Such unauthorized access could enable the injection of policies and workloads into other tenants' clusters.

## CVSS-Vektor

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

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

## Referenzen

- <https://access.redhat.com/security/cve/CVE-2026-73266>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2514217>
- <https://access.redhat.com/errata/RHSA-2026:59556>
- <https://access.redhat.com/errata/RHSA-2026:59557>
- <https://access.redhat.com/errata/RHSA-2026:59558>
- <https://access.redhat.com/errata/RHSA-2026:59559>
- <https://access.redhat.com/errata/RHSA-2026:59579>
- <https://access.redhat.com/errata/RHSA-2026:59593>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-73266) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_