Read the docs
TI-2026-38534 Aliases CVE-2026-53453

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

Priority MEDIUM 40CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0045 39th percentileScored 2026-11-07
Fix Fixed blueprint-studio (ha-china): 2.5.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ha-chinablueprint-studiobefore 2.5.22.5.2Patch availableCNA
  • blueprint-studio Vendorha-china Affected before 2.5.2 Fixed in 2.5.2 Patch available CNA

Remediation

  • Fix · CNA blueprint-studio (ha-china) Fixed in 2.5.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-53453

References

Other 3

  • TI-2026-38536 Blueprint Studio Git credential helper command injection CVSS 4.0HIGH 8.6
  • TI-2026-38535 Blueprint Studio stored Git credentials in plaintext Git credential store CVSS 4.0MEDIUM 6.9
  • TI-2026-38538 Blueprint Studio terminal command working directory not bounded to config directory CVSS 4.0MEDIUM 5.1
  • TI-2026-38537 Blueprint Studio terminal SSH private key written to disk CVSS 4.0MEDIUM 5.6
  • TI-2026-38539 Blueprint Studio API exposed internal exception details CVSS 4.0MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences