{"id":"BIT-ceph-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":["CVE-2026-50152","GHSA-rg9p-5xcp-wm8h"],"modified":"2026-09-02T16:30:16.745020254Z","published":"2026-09-02T14:37:34.261Z","database_specific":{"severity":"Critical","cpes":["cpe:2.3:a:linuxfoundation:ceph:*:*:*:*:*:*:*:*"]},"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"}],"affected":[{"package":{"name":"ceph","ecosystem":"Bitnami","purl":"pkg:bitnami/ceph"},"ranges":[{"type":"SEMVER","events":[{"introduced":"19.0.0"},{"fixed":"19.2.6"},{"introduced":"20.0.0"},{"fixed":"20.2.4"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/ceph/BIT-ceph-2026-50152.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L"}]}],"schema_version":"1.9.0"}