---
cve: "CVE-2026-17107"
severity: "HIGH"
cvss: 8.5
epss: "35%"
vendor: "Red Hat"
kev: false
exploited: false
published: "2026-07-24 18:56:05"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-12T05:06:22+02:00"
---

# CVE-2026-17107

> 8.5 HIGH

## Beschreibung

A flaw was found in the cluster-proxy service-proxy component used in Red Hat Advanced Cluster Management for Kubernetes (RHACM) and multicluster-engine (MCE). The service-proxy appends impersonation group headers to proxied requests without first removing caller-supplied values, and the spoke ServiceAccount holds unrestricted impersonation permissions. An authenticated hub principal can inject an Impersonate-Group header to escalate to cluster-admin on every managed cluster.

## CVSS-Vektor

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

| 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 | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Referenzen

- <https://access.redhat.com/errata/RHSA-2026:46885>
- <https://access.redhat.com/errata/RHSA-2026:47388>
- <https://access.redhat.com/errata/RHSA-2026:47735>
- <https://access.redhat.com/errata/RHSA-2026:47949>
- <https://access.redhat.com/errata/RHSA-2026:47953>
- <https://access.redhat.com/errata/RHSA-2026:47974>
- <https://access.redhat.com/errata/RHSA-2026:48284>
- <https://access.redhat.com/security/cve/CVE-2026-17107>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2506771>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-17107) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_