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NVD / CVE Program· CNA GitHub_M

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

Noroxi assessment

Priority: Monitor (action score 36/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.24% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: ceph (Debian:14) 20.2.4+ds-1; ceph (Red Hat:ceph_storage:8.1::el9) 2:19.2.1-423.el9cp; ceph-base (Red Hat:ceph_storage:8.1::el9) 2:19.2.1-423.el9cp.

Low priority for now. Upgrade to ceph (Debian:14) 20.2.4+ds-1; ceph (Red Hat:ceph_storage:8.1::el9) 2:19.2.1-423.el9cp; ceph-base (Red Hat:ceph_storage:8.1::el9) 2:19.2.1-423.el9cp or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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

CriticalCVSS 9.1 · v3.1—No exploit Fix available
Published
Aug 27, 2026
Updated
Sep 8, 2026
EPSS
0.2% · 16th percentile

Report tools

JSON

Action score

36

Monitor

Low priority for now.

CVSS
36 / 40 · 9.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
9.1
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-50152

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • ceph ceph

    • >= 19.0.0, < 19.2.6, >= 20.0.0, < 20.2.4affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12cephfrom 0—
Debian:14cephbefore 20.2.4+ds-120.2.4+ds-1
Red Hat:ceph_storage:8.1::el9cephbefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-basebefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-base-debuginfobefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-commonbefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-common-debuginfobefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-debuginfobefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-debugsourcebefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-exporter-debuginfobefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-fusebefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-fuse-debuginfobefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-immutable-object-cachebefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-immutable-object-cache-debuginfobefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-mds-debuginfobefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-mgr-debuginfobefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-mibbefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-mon-client-nvmeof-debuginfobefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-mon-debuginfobefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-osd-debuginfobefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-radosgw-debuginfobefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-resource-agentsbefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-selinuxbefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp
Red Hat:ceph_storage:8.1::el9ceph-test-debuginfobefore 2:19.2.1-423.el9cp2:19.2.1-423.el9cp

+37

Same product

ceph: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-30156Ceph: AES-CBC misuse in CephX and RADOSGW enables authentication bypass and credential forgery
    35Monitor
  • CVE-2026-39944Ceph: CephX AES Authentication error
    35Monitor
  • CVE-2018-10861A flaw was found in the way ceph mon handles user requests.
    33Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2025-52555Jun 26, 2025 · CephFS Permission Escalation Vulnerability in Ceph Fuse mounted FS
    26Monitor
  • ← EarlierCVE-2024-48916Jul 30, 2025 · Ceph is vulnerable to authentication bypass through RadosGW
    32Monitor
  • Later →CVE-2026-54330Aug 27, 2026 · Ceph RGW SigV4 handler accepts unsigned x-amz-* headers on presigned requests, allowing privilege escalation
    32Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:ceph20.2.4+ds-1 · Debian:14Package registry (OSV)
red hat:ceph2:19.2.1-423.el9cp · Red Hat:ceph_storage:8.1::el9Package registry (OSV)
red hat:ceph-base2:19.2.1-423.el9cp · Red Hat:ceph_storage:8.1::el9Package registry (OSV)
red hat:ceph-base-debuginfo2:19.2.1-423.el9cp · Red Hat:ceph_storage:8.1::el9Package registry (OSV)
red hat:ceph-common2:19.2.1-423.el9cp · Red Hat:ceph_storage:8.1::el9Package registry (OSV)
red hat:ceph-common-debuginfo2:19.2.1-423.el9cp · Red Hat:ceph_storage:8.1::el9Package registry (OSV)
red hat:ceph-debuginfo2:19.2.1-423.el9cp · Red Hat:ceph_storage:8.1::el9Package registry (OSV)
red hat:ceph-debugsource2:19.2.1-423.el9cp · Red Hat:ceph_storage:8.1::el9Package registry (OSV)
red hat:ceph-exporter-debuginfo2:19.2.1-423.el9cp · Red Hat:ceph_storage:8.1::el9Package registry (OSV)
red hat:ceph-fuse2:19.2.1-423.el9cp · Red Hat:ceph_storage:8.1::el9Package registry (OSV)
red hat:ceph-fuse-debuginfo2:19.2.1-423.el9cp · Red Hat:ceph_storage:8.1::el9Package registry (OSV)
red hat:ceph-immutable-object-cache2:19.2.1-423.el9cp · Red Hat:ceph_storage:8.1::el9Package registry (OSV)
red hat:ceph-immutable-object-cache-debuginfo2:19.2.1-423.el9cp · Red Hat:ceph_storage:8.1::el9Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
low · data or configuration can be modified
Availability
low · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
Low
Availability impact
Low

Weakness class (CWE)

CWE-285 · Improper Authorization

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records