---
id: CVE-2026-50152
title: >-
  Ceph is an open-source distributed storage platform providing object, block,
  and file storage
summary: >-
  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, al…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L'
cwe:
  - CWE-285
published: '2026-08-28'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T21:11:56.250'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-50152'
references:
  - url: >-
      https://github.com/ceph/ceph/commit/d971bb2b6199f70b1708a20a63fa944ee7a94727
    label: security-advisories@github.com
  - url: >-
      https://github.com/ceph/ceph/commit/f2840d2fd338ab5de2865f0f78684bbf7b888c84
    label: security-advisories@github.com
  - url: 'https://github.com/ceph/ceph/security/advisories/GHSA-rg9p-5xcp-wm8h'
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00248
epssPercentile: 0.14266
ingestedAt: '2026-09-08T22:12:30.941Z'
---

## Overview

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

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.