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Ceph: 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… (CVE-2026-50152)

0
Medium
VulnerabilityCVE-2026-50152gcveosvubuntu-cve-2026-50152cve-2026-50152ubuntu-pro-14-04-ltsubuntu-pro-16-04-ltsubuntu-pro-18-04-ltsubuntu-pro-20-04-ltsubuntu-22-04-ltsubuntu-24-04-ltsubuntu-26-10ubuntu-26-04-lts
Published: 08/28/2026 (08/28/2026, 00:18:00 UTC)
Source: GCVE Database
Product: ceph

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 v3.1

Score 9.1critical

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L

Affected software

Ubuntu:Pro:14.04:LTSmore threats →ghsa
ceph
pkg:deb/ubuntu/ceph?arch=source&distro=esm-infra-legacy/trusty
Affected versions
=0.67.4-0ubuntu2=0.67.4-0ubuntu3=0.72-0ubuntu1=0.72.1-0ubuntu1=0.72.1-2=0.72.1-3=0.72.2-1=0.72.2-2=0.78-0ubuntu1=0.79-0ubuntu1=0.80.1-0ubuntu1=0.80.1-0ubuntu1.1=0.80.5-0ubuntu0.14.04.1=0.80.7-0ubuntu0.14.04.1=0.80.9-0ubuntu0.14.04.1=0.80.9-0ubuntu0.14.04.2=0.80.10-0ubuntu0.14.04.1=0.80.10-0ubuntu1.14.04.2=0.80.10-0ubuntu1.14.04.3=0.80.11-0ubuntu1.14.04.1=0.80.11-0ubuntu1.14.04.2=0.80.11-0ubuntu1.14.04.3=0.80.11-0ubuntu1.14.04.4=0.80.11-0ubuntu1.14.04.4+esm2=0.80.11-0ubuntu1.14.04.4+esm3=0.80.11-0ubuntu1.14.04.4+esm4
Ubuntu:Pro:16.04:LTSmore threats →ghsa
ceph
pkg:deb/ubuntu/ceph?arch=source&distro=esm-infra/xenial
Affected versions
=0.94.3-0ubuntu2=0.94.5-0ubuntu1=9.2.0-0ubuntu3=9.2.0-0ubuntu4=9.2.0-0ubuntu5=9.2.0-0ubuntu6=10.0.2-0ubuntu1=10.0.3-0ubuntu1=10.0.5-0ubuntu1=10.1.0-0ubuntu1=10.1.1-0ubuntu1=10.1.2-0ubuntu1=10.2.0-0ubuntu0.16.04.1=10.2.0-0ubuntu0.16.04.2=10.2.2-0ubuntu0.16.04.2=10.2.3-0ubuntu0.16.04.2=10.2.5-0ubuntu0.16.04.1=10.2.6-0ubuntu0.16.04.1=10.2.7-0ubuntu0.16.04.1=10.2.9-0ubuntu0.16.04.1=10.2.10-0ubuntu0.16.04.1=10.2.11-0ubuntu0.16.04.1=10.2.11-0ubuntu0.16.04.2=10.2.11-0ubuntu0.16.04.3=10.2.11-0ubuntu0.16.04.3+esm1=10.2.11-0ubuntu0.16.04.3+esm2=10.2.11-0ubuntu0.16.04.3+esm3
Ubuntu:Pro:18.04:LTSmore threats →ghsa
ceph
pkg:deb/ubuntu/ceph?arch=source&distro=esm-infra/bionic
Affected versions
=12.2.0-0ubuntu1=12.2.1-0ubuntu1=12.2.2-0ubuntu1=12.2.2-0ubuntu2=12.2.4-0ubuntu1=12.2.4-0ubuntu1.1=12.2.7-0ubuntu0.18.04.1=12.2.8-0ubuntu0.18.04.1=12.2.8-0ubuntu0.18.04.2=12.2.11-0ubuntu0.18.04.1=12.2.11-0ubuntu0.18.04.2=12.2.12-0ubuntu0.18.04.1=12.2.12-0ubuntu0.18.04.2=12.2.12-0ubuntu0.18.04.3=12.2.12-0ubuntu0.18.04.4=12.2.12-0ubuntu0.18.04.5=12.2.13-0ubuntu0.18.04.2=12.2.13-0ubuntu0.18.04.3=12.2.13-0ubuntu0.18.04.4=12.2.13-0ubuntu0.18.04.5=12.2.13-0ubuntu0.18.04.6=12.2.13-0ubuntu0.18.04.7=12.2.13-0ubuntu0.18.04.8=12.2.13-0ubuntu0.18.04.10=12.2.13-0ubuntu0.18.04.11=12.2.13-0ubuntu0.18.04.11+esm1=12.2.13-0ubuntu0.18.04.11+esm2=12.2.13-0ubuntu0.18.04.11+esm3
Ubuntu:Pro:20.04:LTSmore threats →ghsa
ceph
pkg:deb/ubuntu/ceph?arch=source&distro=esm-infra/focal
Affected versions
=14.2.2-0ubuntu3=14.2.2-0ubuntu4=14.2.4-0ubuntu1=14.2.4-0ubuntu2=14.2.4-0ubuntu3=15.1.0-0ubuntu2=15.1.0-0ubuntu3=15.1.1-0ubuntu1=15.2.0-0ubuntu1=15.2.0-0ubuntu2=15.2.1-0ubuntu1=15.2.1-0ubuntu2=15.2.3-0ubuntu0.20.04.1=15.2.3-0ubuntu0.20.04.2=15.2.5-0ubuntu0.20.04.1=15.2.7-0ubuntu0.20.04.1=15.2.7-0ubuntu0.20.04.2=15.2.8-0ubuntu0.20.04.1=15.2.11-0ubuntu0.20.04.2=15.2.12-0ubuntu0.20.04.1=15.2.13-0ubuntu0.20.04.1=15.2.13-0ubuntu0.20.04.2=15.2.14-0ubuntu0.20.04.1=15.2.14-0ubuntu0.20.04.2=15.2.16-0ubuntu0.20.04.1=15.2.17-0ubuntu0.20.04.1=15.2.17-0ubuntu0.20.04.3=15.2.17-0ubuntu0.20.04.4=15.2.17-0ubuntu0.20.04.5=15.2.17-0ubuntu0.20.04.6=15.2.17-0ubuntu0.20.04.6+esm1=15.2.17-0ubuntu0.20.04.6+esm2
Ubuntu:22.04:LTSmore threats →ghsa
ceph
pkg:deb/ubuntu/ceph?arch=source&distro=jammy
Affected versions
=16.2.6-0ubuntu1=16.2.6-0ubuntu2=16.2.6-0ubuntu3=16.2.7-0ubuntu1=16.2.7-0ubuntu4=17.1.0-0ubuntu1=17.1.0-0ubuntu2=17.1.0-0ubuntu3=17.2.0-0ubuntu0.22.04.1=17.2.0-0ubuntu0.22.04.2=17.2.5-0ubuntu0.22.04.2=17.2.5-0ubuntu0.22.04.3=17.2.6-0ubuntu0.22.04.1=17.2.6-0ubuntu0.22.04.2=17.2.6-0ubuntu0.22.04.3=17.2.7-0ubuntu0.22.04.1=17.2.7-0ubuntu0.22.04.2=17.2.9-0ubuntu0.22.04.1=17.2.9-0ubuntu0.22.04.2=17.2.9-0ubuntu0.22.04.3=17.2.9-0ubuntu0.22.04.4
Ubuntu:24.04:LTSmore threats →ghsa
ceph
pkg:deb/ubuntu/ceph?arch=source&distro=noble
Affected versions
=18.2.0-0ubuntu3=18.2.0-0ubuntu6=18.2.0-0ubuntu7=19.2.0~git20240301.4c76c50-0ubuntu3=19.2.0~git20240301.4c76c50-0ubuntu4=19.2.0~git20240301.4c76c50-0ubuntu6=19.2.0~git20240301.4c76c50-0ubuntu6.1=19.2.0-0ubuntu0.24.04.1=19.2.0-0ubuntu0.24.04.2=19.2.1-0ubuntu0.24.04.2=19.2.3-0ubuntu0.24.04.1=19.2.3-0ubuntu0.24.04.2=19.2.3-0ubuntu0.24.04.3
Ubuntu:26.10more threats →ghsa
ceph
pkg:deb/ubuntu/ceph?arch=source&distro=stonking
Affected versions
=20.2.0-0ubuntu2=20.2.1-0ubuntu1=20.2.1-0ubuntu3=20.2.4+ds-0ubuntu1=20.2.4+ds1-0ubuntu1
Ubuntu:26.04:LTSmore threats →ghsa
ceph
pkg:deb/ubuntu/ceph?arch=source&distro=resolute
Affected versions
=19.2.1-0ubuntu3=19.2.3-0ubuntu2=19.2.3-0ubuntu3=19.2.3-0ubuntu4=20.2.0-0ubuntu1=20.2.0-0ubuntu2=20.2.0-0ubuntu2.1

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-50152
Osv Schema Version
1.7.0
Ecosystems
["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.10","Ubuntu:26.04:LTS"]
Cvss Version
3.1

Threat ID: 6ad3f6122cdf04f65666414d

Added to database: 10/17/2026, 22:26:26 UTC

Last updated: 10/18/2026, 02:05:25 UTC

Views: 2

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