{"id":"CVE-2026-48086","summary":"OpenReception: Tenant admin self-promotes to GLOBAL_ADMIN","details":"OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. Prior to version 1.0.2, a TENANT_ADMIN promotes themselves to platform-wide GLOBAL_ADMIN through a single PUT request. The role-update handler accepts the `GLOBAL_ADMIN` enum value from any tenant admin updating their own tenant's staff. No policy check enforces that \"only an existing GLOBAL_ADMIN may grant GLOBAL_ADMIN\", so the schema validation IS the authorization decision. After re-login, the JWT contains the new role and the formerly-tenant-scoped admin reaches every other tenant on the platform. On the hosted OpenReception service this is a scope-changed escalation: a single customer-side tenant administrator gains full platform-wide administrative control over all other tenants' configuration, users, staff records, operational metadata, and tenant lifecycle. Plaintext appointment contents remain subject to the E2E model unless chained with the staff-crypto poisoning issue (V-4) or with staff-passkey hijacking (V-1). On a single-tenant self-hosted deployment it is still a privilege escalation because TENANT_ADMIN should not be able to create new tenants, modify global configuration, or manage other administrators. The same handler also accepts updates targeted at any colleague within the tenant. A tenant admin can promote a separate collaborator account instead of themselves, leaving their own audit trail clean while the platform-wide breach happens through a separate identity. Version 1.0.2 fixes the issue.","aliases":["GHSA-5qfr-7q4g-3469"],"modified":"2026-08-09T03:30:44.853895888Z","published":"2026-08-06T21:30:32.142Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-269"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48086.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48086.json"},{"type":"ADVISORY","url":"https://github.com/open-reception/appointment-booking-software/security/advisories/GHSA-5qfr-7q4g-3469"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48086"},{"type":"FIX","url":"https://github.com/open-reception/appointment-booking-software/commit/8525d35a41c31078d9f01c62e9687e653cf1a494"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/open-reception/appointment-booking-software","events":[{"introduced":"0"},{"fixed":"8525d35a41c31078d9f01c62e9687e653cf1a494"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.0.2"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v1.0.1","v1.0.0","v1.0.0-rc2","v1.0.0-rc"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48086.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"}]}