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TI-2026-38537 Aliases CVE-2026-53456

Blueprint Studio terminal SSH private key written to disk

Priority LOW 25CWE-522Published · Updated

Key facts

Attack vector
Local
Privileges required
High
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-522.

Summary

Blueprint Studio is a VS Code-like file editor for Home Assistant configuration files. Prior to 2.5.2, Blueprint Studio terminal SSH key authentication in custom_components/blueprint_studio/backend/terminal_manager.py wrote SSH private-key material to a file under the Home Assistant configuration directory before applying restrictive permissions and relied on best-effort cleanup. The key could temporarily remain on disk and could persist if cleanup failed or Home Assistant crashed. A user or process with filesystem access to the Home Assistant configuration directory could obtain the residual private key. This issue is fixed in version 2.5.2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00209 11th 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-2026-53456

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-2026-38538 Blueprint Studio terminal command working directory not bounded to config directory CVSS 4.0MEDIUM 5.1
  • 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