# 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.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Aug 2026
- **Updated:** 19 Aug 2026
- **Also known as:** GHSA-5cc6-r4rr-fpfh

## 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 (Improper Limitation of a Pathname to a Restricted Directory)

## 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.

## Is CVE-2026-53457 being exploited?

There is no known exploitation of CVE-2026-53457 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-53457 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-53457 in the wild and no public exploit code.

Affected product: ha-china blueprint-studio. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-53457/ (Markdown: https://insights.sbomify.com/CVE-2026-53457/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-53457
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-53457
- OSV: https://osv.dev/vulnerability/CVE-2026-53457

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-53457/
Summaries are generated and may contain mistakes; the official description above is the record.