---
cve: "CVE-2026-66795"
severity: "CRITICAL"
cvss: 9.1
epss: "22%"
vendor: "Generic Security"
kev: false
exploited: false
published: "2026-08-17 21:16:47"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T04:53:39+02:00"
---

# CVE-2026-66795

> 9.1 CRITICAL

## Beschreibung

A flaw was found in the managedcluster-import-controller. The Certificate Signing Request (CSR) auto-approval logic improperly validates incoming CSRs, specifically by not inspecting the signer name or decoding the PEM-encoded x509 CSR. This vulnerability allows a privileged service account on a spoke cluster to submit a malicious CSR. Successful exploitation can lead to privilege escalation, enabling the attacker to obtain administrative credentials on the hub cluster.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Hoch | good |
| 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-2026-66795>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2507540>
- <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-2026-66795) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_