{"id":"CVE-2026-53453","summary":"Blueprint Studio API authorization bypass for non-admin Home Assistant users","details":"Blueprint Studio is a VS Code-like file editor for Home Assistant configuration files. Prior to 2.5.2, Blueprint Studio exposed administrator-intended backend API actions to any authenticated Home Assistant user because the backend did not consistently enforce the panel's admin-only authorization boundary. Affected surfaces included the backend API, upload API, stream routes, terminal WebSocket, Blueprint Studio WebSocket subscriptions, call_service, render_template, global_replace, file and stream access paths, upload handling, and terminal helpers. A non-admin user could invoke arbitrary Home Assistant services, expose Home Assistant state through templates, modify configuration files, access streamed or downloaded configuration content, upload files, or reach terminal-related helpers. These actions could compromise the confidentiality, integrity, and availability of the Home Assistant installation. This issue is fixed in version 2.5.2.","aliases":["GHSA-ppwq-ch6x-936g"],"modified":"2026-09-10T03:30:50.126173652Z","published":"2026-08-18T20:48:20.578Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-862"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53453.json"},"references":[{"type":"WEB","url":"https://github.com/ha-china/blueprint-studio/releases/tag/v2.5.2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53453.json"},{"type":"ADVISORY","url":"https://github.com/ha-china/blueprint-studio/security/advisories/GHSA-ppwq-ch6x-936g"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53453"},{"type":"FIX","url":"https://github.com/ha-china/blueprint-studio/commit/943aed0be67f3a910b0f70a3864288d5e17e55ce"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ha-china/blueprint-studio","events":[{"introduced":"0"},{"fixed":"943aed0be67f3a910b0f70a3864288d5e17e55ce"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.5.2"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v2.5.1","v2.5.0","v2.4.8","v2.4.7","v2.4.6","v2.4.4","v2.4.3","v2.4.2","v2.4.1","v2.4.0","v2.3.0","v2.2.2","v2.2.1","v2.2.0","v2.1.5","v2.1.4","v2.1.3","v2.1.2","v2.1.1","v2.1.0","v2.0.6","v2.0.5","v2.0.4","v2.0.3","v2.0.2","v2.0.1","v2.0.0","v1.5.2","v1.5.1","v1.5.0","v1.4.1","v1.4.0","v1.3.2","v1.3.1","v1.3.0","v1.2.1","v.1.2.0","v1.1.1","V1.1.0","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53453.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}