---
cve: "CVE-2026-50152"
severity: "CRITICAL"
cvss: 9.1
epss: "0.2%"
vendor: "ceph"
kev: false
exploited: false
published: "2026-08-28 00:18:07"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-10-10T04:48:00+02:00"
---

# CVE-2026-50152

> 9.1 CRITICAL · 🧪 PoC

## Beschreibung

Ceph is an open-source distributed storage platform providing object, block, and file storage. In versions prior to 20.2.4 and 19.2.6, the Monitor subscription handler fails to properly authorize access to the configuration-key store, allowing any CephX user with only  `mon allow r` capabilities to read the entire store by sending a single crafted MMonSubscribe message. The config-key store holds sensitive secrets including OSD LUKS disk-encryption passphrases and, on cephadm-managed clusters, the SSH private key that cephadm uses to reach every host in the cluster. Because that key grants root on every node under the default cephadm configuration, a low-privileged read-only account can escalate to full cluster and host compromise. This issue is fixed in versions 20.2.4 and 19.2.6

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

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

| 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 | Gering | warn |
| A Verfügbarkeit | Gering | warn |

## Patch verfügbar (OSV)

- f9fd95b4335bad6a26d7a74468f55d269e8dbef4 (Commit)
- 7f793731f1b39eb4f465e960113d2363c311b964 (Commit)

## Referenzen

- <https://github.com/ceph/ceph/security/advisories/GHSA-rg9p-5xcp-wm8h>
- <https://github.com/ceph/ceph/commit/d971bb2b6199f70b1708a20a63fa944ee7a94727>
- <https://github.com/ceph/ceph/commit/f2840d2fd338ab5de2865f0f78684bbf7b888c84>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-50152/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_