{"id":"CVE-2026-50152","state":"PUBLISHED","title":"Ceph Monitor subscription handler improperly authorizes config-key store reads, exposing cluster secrets to read-only users","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","publishedAt":"2026-08-27T20:53:42.353Z","updatedAt":"2026-09-01T14:48:11.476Z","severity":{"score":9.1,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["ceph ceph"],"affected":[{"vendor":"ceph","product":"ceph","versions":[{"version":">= 19.0.0, < 19.2.6","status":"affected"},{"version":">= 20.0.0, < 20.2.4","status":"affected"}]}],"references":["https://github.com/ceph/ceph/security/advisories/GHSA-rg9p-5xcp-wm8h","https://github.com/ceph/ceph/commit/d971bb2b6199f70b1708a20a63fa944ee7a94727","https://github.com/ceph/ceph/commit/f2840d2fd338ab5de2865f0f78684bbf7b888c84"],"weaknesses":["CWE-285"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/50xxx/CVE-2026-50152.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-50152","state":"PUBLISHED","datePublished":"2026-08-27T20:53:42.353Z","dateUpdated":"2026-09-01T14:48:11.476Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-03T20:54:20.431Z"},"containers":{"cna":{"title":"Ceph Monitor subscription handler improperly authorizes config-key store reads, exposing cluster secrets to read-only users","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  `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"}],"affected":[{"vendor":"ceph","product":"ceph","versions":[{"version":">= 19.0.0, < 19.2.6","status":"affected"},{"version":">= 20.0.0, < 20.2.4","status":"affected"}]}],"references":[{"url":"https://github.com/ceph/ceph/security/advisories/GHSA-rg9p-5xcp-wm8h","name":"https://github.com/ceph/ceph/security/advisories/GHSA-rg9p-5xcp-wm8h","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/ceph/ceph/commit/d971bb2b6199f70b1708a20a63fa944ee7a94727","name":"https://github.com/ceph/ceph/commit/d971bb2b6199f70b1708a20a63fa944ee7a94727","tags":["x_refsource_MISC"]},{"url":"https://github.com/ceph/ceph/commit/f2840d2fd338ab5de2865f0f78684bbf7b888c84","name":"https://github.com/ceph/ceph/commit/f2840d2fd338ab5de2865f0f78684bbf7b888c84","tags":["x_refsource_MISC"]}],"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","lang":"en","description":"CWE-285: Improper Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-27T20:53:42.353Z"},"source":{"advisory":"GHSA-rg9p-5xcp-wm8h","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-01T03:56:17.495692Z","id":"CVE-2026-50152","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-01T14:48:11.476Z"}}]}}}