{"id":"CVE-2026-50152","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","aliases":["BIT-ceph-2026-50152","GHSA-rg9p-5xcp-wm8h"],"modified":"2026-10-28T02:30:23.973629116Z","published":"2026-08-27T20:53:42.353Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50152.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-285"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50152.json"},{"type":"ADVISORY","url":"https://github.com/ceph/ceph/security/advisories/GHSA-rg9p-5xcp-wm8h"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50152"},{"type":"FIX","url":"https://github.com/ceph/ceph/commit/d971bb2b6199f70b1708a20a63fa944ee7a94727"},{"type":"FIX","url":"https://github.com/ceph/ceph/commit/f2840d2fd338ab5de2865f0f78684bbf7b888c84"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ceph/ceph","events":[{"introduced":"1680e466aab77cdf9ba07394bea664106580b32b"},{"fixed":"f9fd95b4335bad6a26d7a74468f55d269e8dbef4"},{"introduced":"3d911bce7d6557aa2d1826543a4a4e88981639da"},{"fixed":"7f793731f1b39eb4f465e960113d2363c311b964"},{"fixed":"d971bb2b6199f70b1708a20a63fa944ee7a94727"},{"fixed":"f2840d2fd338ab5de2865f0f78684bbf7b888c84"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"19.0.0"},{"fixed":"19.2.6"}],"source":"AFFECTED_FIELD","strategy":"StringRangeExpression"},{"range":[{"introduced":"20.0.0"},{"fixed":"20.2.4"}],"source":"AFFECTED_FIELD","strategy":"StringRangeExpression"},{"source":"REFERENCES_COMMIT","range":[{"fixed":"d971bb2b6199f70b1708a20a63fa944ee7a94727"}]},{"range":[{"fixed":"f2840d2fd338ab5de2865f0f78684bbf7b888c84"}],"source":"REFERENCES_COMMIT"}]}}],"versions":["v20.2.3","v19.2.5","v20.2.2-pre.ibm","v20.2.1-pre.ibm.0","v20.1.0-pre.ibm.2","v20.1.0-pre.ibm.1","v20.0.0-pre.ibm","v19.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50152.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L"}]}