CVE-2026-53453

Received Received - Intake

Authorization Bypass in Blueprint Studio

Publication date: 2026-08-18

Last updated on: 2026-08-19

Assigner: GitHub, Inc.

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.

CVSS Scores

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Meta Information

Published

2026-08-18

Last Modified

2026-08-19

Generated

2026-09-08

AI Q&A

2026-08-19

EPSS Evaluated

2026-09-07

NVD

CVE-2026-53453

Affected Vendors & Products

Vendor	Product	Version / Range
blueprint_studio	blueprint_studio	2.5.2

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-862	The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Executive Summary

This vulnerability in Blueprint Studio, a VS Code-like editor for Home Assistant configuration files, allowed non-admin users to perform administrator-intended actions due to missing authorization checks. The backend failed to enforce admin-only access for API actions, uploads, file access, and terminal helpers. This could let attackers modify configurations, access sensitive data, or disrupt services.

Detection Guidance

To detect this vulnerability, check the installed version of Blueprint Studio. If it is below 2.5.2, the system is vulnerable. Verify user permissions to ensure non-admin users cannot access restricted API endpoints or services.

Impact Analysis

If exploited, this vulnerability could allow unauthorized users to change Home Assistant settings, access private data, upload malicious files, or run terminal commands. This may lead to data breaches, system disruptions, or complete compromise of the Home Assistant installation.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive configuration files and Home Assistant state, potentially exposing personal data. This may violate GDPR's data protection principles and HIPAA's safeguards for protected health information if such data is involved.

Mitigation Strategies

Update Blueprint Studio to version 2.5.2 or later to fix the authorization bypass issue. Remove non-admin user access to sensitive API endpoints and file operations until the update is applied.

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