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CVE-2026-53453

Blueprint Studio API authorization bypass for non-admin Home Assistant users

HIGH
8.7
CVSS Score
Published: August 18, 2026 at 08:48 PM UTC
Updated: October 22, 2026 at 10:10 PM UTC
1 product affected across 1 vendorBlueprint Studio

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Severity
HIGH8.7
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Blueprint Studio· Ha China
90%
v < 2.5.2
Affected range stops below 2.5.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

x_refsource_CONFIRM
Source: cverecord
https://github.com/ha-china/blueprint-studio/security/advisories/GHSA-ppwq-ch6x-936g
x_refsource_MISC
Source: cverecord
https://github.com/ha-china/blueprint-studio/commit/943aed0be67f3a910b0f70a3864288d5e17e55ce
x_refsource_MISC
Source: cverecord
https://github.com/ha-china/blueprint-studio/releases/tag/v2.5.2

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-862

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