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Back to active CVEs
Critical · CVSS 9.1CVE-2026-50152

Ceph Monitor subscription handler improperly authorizes config-key store reads, exposing cluster secrets to read-only usersCVE-2026-50152

Answer in brief

CVE-2026-50152 records a Critical severity (CVSS 9.1) vulnerability in Ceph Monitor subscription handler improperly authorizes config-key store reads, exposing cluster secrets to read-only users. The current sources do not mark it as known exploited. The current feed maps ceph/ceph (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 27, 2026Updated Sep 8, 2026Source checked Oct 12, 2026First seen by HOL Aug 27, 2026Material review Sep 8, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.1
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps ceph/ceph (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
ceph/cephgeneric>=19.0.0 <19.2.6 || >=20.0.0 <20.2.419.2.6, 20.2.4

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for ceph/ceph.
  2. 2Review the reported fix. Update ceph/ceph to 19.2.6 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 27, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source 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

Quoted source text, attributed separately from HOL analysis.

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Record context

Vulnerability class
Privilege Escalation
EPSS
Not reported
CWE IDs
CWE-285
Source
CVE List V5
Source checked
Oct 12, 2026
References
3 linked sources
Open source record