# CVE-2026-53455: Blueprint Studio Git credential helper command injection

> Attackers can execute arbitrary shell commands via malicious Git credentials in Blueprint Studio, compromising Home Assistant configuration data.

- **Severity:** High 8.6 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/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-wjpc-mc3f-w5rg

## What is CVE-2026-53455?

CVE-2026-53455 is a high-severity command injection 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, Blueprint Studio generated a shell-based Git credential helper in custom_components/blueprint_studio/backend/git_manager.py by interpolating the configured Git username and token directly into executable helper script content without validating credential values. An attacker able to set Git credentials could include newline characters or shell syntax in a username or token. When Git executed the generated credential helper, the injected shell commands ran with the operating-system privileges of Home Assistant and could access or modify Home Assistant configuration data. This issue is fixed in version 2.5.2.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-53455?


## How do I fix CVE-2026-53455?

No fix has been published for CVE-2026-53455 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-53455 being exploited?

There is no known exploitation of CVE-2026-53455 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-53455 and fix it if it is affected.

What it is: CVE-2026-53455 is a high-severity command injection 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-2026-53455 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-2026-53455/ (Markdown: https://insights.sbomify.com/CVE-2026-53455/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-53455
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-53455
- OSV: https://osv.dev/vulnerability/CVE-2026-53455

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-53455/
Summaries are generated and may contain mistakes; the official description above is the record.