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CRITICAL

CVE-2026-50152

CVSS v3

9.1

CRITICAL

EPSS Score

0.2 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • cephBitnamifrom 19.0.0 · fixed in 19.2.6

Vendor advisories

  • CVE-2026-50152 Red Hat Product Security7 products fixed · 193 known affected

    ceph: ceph: MON subscription handler exposes config-key store to low-privilege CephX users

    ceph-base as a component of Red Hat Ceph Storage 4 · ceph-common as a component of Red Hat Ceph Storage 4 · ceph-fuse as a component of Red Hat Ceph Storage 4

  • RHSA-2026:83548 Red Hat Product Security3 products fixed

    Red Hat Security Advisory: Red Hat Ceph Storage

  • RHSA-2026:79243 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Red Hat Ceph Storage

  • RHSA-2026:79101 Red Hat Product Security221 products fixed

    Red Hat Security Advisory: Red Hat Ceph Storage 8.1 security and bug fix updates

Full record on NVD

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

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
Published
2026-08-28
Last Modified
2026-08-28

Frequently asked questions

What is CVE-2026-50152?

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

Is CVE-2026-50152 actively exploited?

Active exploitation of CVE-2026-50152 has not been confirmed. Its EPSS score was 0.2% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-50152?

CVE-2026-50152 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L.

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