CVE-2026-53457 Blueprint Studio terminal command working directory not bounded to config directory
An administrator can execute terminal commands in directories outside the intended configuration boundary, allowing access to or modification of host files.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-53457?
CVE-2026-53457 is a medium-severity path traversal vulnerability in ha-china blueprint-studio, published on 18 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Weakness: CWE-22
Which versions are affected by CVE-2026-53457?
How do I fix CVE-2026-53457?
No fix has been published for CVE-2026-53457 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-53457 being exploited?
There is no known exploitation of CVE-2026-53457 in the wild and no public exploit code.
Sources
Also known as GHSA-5cc6-r4rr-fpfh.