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TI-2026-38538 Aliases CVE-2026-53457

Blueprint Studio terminal command working directory not bounded to config directory

Priority LOW 25CWE-22Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Blueprint Studio is a VS Code-like file editor for Home Assistant configuration files. Prior to 2.5.2, the legacy stateless terminal command execution path in custom_components/blueprint_studio/backend/terminal_manager.py accepted a cwd working-directory parameter and checked only whether the directory existed, without requiring it to remain inside the Home Assistant configuration directory. An administrator using the restricted terminal helper could select an existing directory outside the intended configuration boundary. Commands could then access or modify host paths permitted by the Home Assistant container and filesystem permissions, weakening the helper's expected filesystem restriction. This issue is fixed in version 2.5.2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00756 55th 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
Partial

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-2026-53457

References

Other 3

  • TI-2026-38536 Blueprint Studio Git credential helper command injection CVSS 4.0HIGH 8.6
  • TI-2026-38534 Blueprint Studio API authorization bypass for non-admin Home Assistant users CVSS 4.0HIGH 8.7
  • TI-2026-38535 Blueprint Studio stored Git credentials in plaintext Git credential store CVSS 4.0MEDIUM 6.9
  • 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