Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-09-02 14:37

Modified

2026-09-02 15:04

Summary

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

Details

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

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "ceph",
        "purl": "pkg:bitnami/ceph"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "19.0.0"
            },
            {
              "fixed": "19.2.6"
            },
            {
              "introduced": "20.0.0"
            },
            {
              "fixed": "20.2.4"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-50152"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:linuxfoundation:ceph:*:*:*:*:*:*:*:*"
    ],
    "severity": "Critical"
  },
  "details": "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 \u00a0`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",
  "id": "BIT-ceph-2026-50152",
  "modified": "2026-09-02T15:04:30.450Z",
  "published": "2026-09-02T14:37:34.261Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ceph/ceph/commit/d971bb2b6199f70b1708a20a63fa944ee7a94727"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ceph/ceph/commit/f2840d2fd338ab5de2865f0f78684bbf7b888c84"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ceph/ceph/security/advisories/GHSA-rg9p-5xcp-wm8h"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-50152"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Ceph Monitor subscription handler improperly authorizes config-key store reads, exposing cluster secrets to read-only users"
}

CVE-2026-50152 (GCVE-0-2026-50152)

Vulnerability from cvelistv5 – Published: 2026-08-27 20:53 – Updated: 2026-09-01 14:48

Title

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

Summary

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

Severity

9.1 (Critical)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-01 03:56 UTC

CWE

CWE-285 - Improper Authorization

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/ceph/ceph/security/advisories/…	x_refsource_CONFIRM
https://github.com/ceph/ceph/commit/d971bb2b6199f…	x_refsource_MISC
https://github.com/ceph/ceph/commit/f2840d2fd338a…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
ceph	ceph	Affected: >= 19.0.0, < 19.2.6 Affected: >= 20.0.0, < 20.2.4

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-50152",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-01T03:56:17.495692Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-01T14:48:11.476Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "ceph",
          "vendor": "ceph",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 19.0.0, \u003c 19.2.6"
            },
            {
              "status": "affected",
              "version": "\u003e= 20.0.0, \u003c 20.2.4"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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 \u00a0`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"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-285",
              "description": "CWE-285: Improper Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-27T20:53:42.353Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/ceph/ceph/security/advisories/GHSA-rg9p-5xcp-wm8h",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/ceph/ceph/security/advisories/GHSA-rg9p-5xcp-wm8h"
        },
        {
          "name": "https://github.com/ceph/ceph/commit/d971bb2b6199f70b1708a20a63fa944ee7a94727",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ceph/ceph/commit/d971bb2b6199f70b1708a20a63fa944ee7a94727"
        },
        {
          "name": "https://github.com/ceph/ceph/commit/f2840d2fd338ab5de2865f0f78684bbf7b888c84",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ceph/ceph/commit/f2840d2fd338ab5de2865f0f78684bbf7b888c84"
        }
      ],
      "source": {
        "advisory": "GHSA-rg9p-5xcp-wm8h",
        "discovery": "UNKNOWN"
      },
      "title": "Ceph Monitor subscription handler improperly authorizes config-key store reads, exposing cluster secrets to read-only users"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-50152",
    "datePublished": "2026-08-27T20:53:42.353Z",
    "dateReserved": "2026-06-03T20:54:20.431Z",
    "dateUpdated": "2026-09-01T14:48:11.476Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

Vulnerability from bitnami_vulndb

CVE-2026-50152 (GCVE-0-2026-50152)

Tags

Sightings

Nomenclature