CVE-2026-50152

Aliases:DEBIAN-CVE-2026-50152UBUNTU-CVE-2026-50152
Advisory lineage Upstream: 0 Downstream: 1
Downstream
MGASA-2026-0389
Awaiting Analysis
Published: 27 Aug 2026, 20:53
Last modified:01 Sept 2026, 14:48

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.1 CRITICAL
v3.1 (cve.org)
EPSS Score
0.16% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

27 Aug 2026, 20:53
Published
Vulnerability first disclosed
01 Sept 2026, 14:48
Last Modified
Vulnerability information updated

Description

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

CVSS Metrics

  • v3.1•CRITICAL•Score: 9.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L

EPSS Trends

Current EPSS score: 0.16%• Percentile: 6%

Techniques & Countermeasures

  • CWE-285•Improper Authorization

    The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.

Affected Systems

  • ceph•ceph

    ≥ 19.0.0, < 19.2.6 | ≥ 20.0.0, < 20.2.4

  • debian•ceph

    all | all | all | all | < 20.2.4+ds-1

  • ubuntu•ceph

    all | all | all | all

References (7)