CVE-2026-53453 Blueprint Studio API authorization bypass for non-admin Home Assistant users
Non-admin users can bypass authorization to execute services, modify files, and access sensitive data in Blueprint Studio.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-53453?
CVE-2026-53453 is a high-severity missing authorization vulnerability in ha-china blueprint-studio, published on 18 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-53453?
How do I fix CVE-2026-53453?
No fix has been published for CVE-2026-53453 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-53453 being exploited?
There is no known exploitation of CVE-2026-53453 in the wild and no public exploit code.
Sources
Also known as GHSA-ppwq-ch6x-936g.