CVE-2026-53453Network attack vector

Non-admin admin-API access via missing checks

Published Aug 18, 2026 · Updated Aug 19, 2026

Missing authorization in Blueprint Studio before 2.5.2 allows remote authenticated users to invoke administrator-only backend actions. Backend, upload, stream, terminal WebSocket, and Blueprint Studio WebSocket handlers authenticated Home Assistant users but did not consistently reject requests unless user.is_admin before executing service calls, template rendering, file access, global replacement, uploads, and related helpers. Any non-admin Home Assistant account could cross the panel's admin-only boundary and read or modify configuration data, expose Home Assistant state, trigger arbitrary services, and reach terminal-related helpers.

CVSS severity8.7
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Blueprint Studio before 2.5.2 allows remote authenticated users to invoke administrator-only backend actions. Backend, upload, stream, terminal WebSocket, and Blueprint Studio WebSocket handlers authenticated Home Assistant users but did not consistently reject requests unless user.is_admin before executing service calls, template rendering, file access, global replacement, uploads, and related helpers. Any non-admin Home Assistant account could cross the panel's admin-only boundary and read or modify configuration data, expose Home Assistant state, trigger arbitrary services, and reach terminal-related helpers.

The record

CVE
CVE-2026-53453
Published
Aug 18, 2026
Updated
Aug 19, 2026
Vendor
Home Assistant China
Product
Blueprint Studio
Classifications
CWE-862, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Home Assistant China · Blueprint Studioversion=< 2.5.2

Published CVSS scores

8.7GitHub CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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