# CVE-2026-104679: XML external entity in VOCALOID6 Editor

> Attackers can exploit XML external entity flaws in VOCALOID6 Editor to leak sensitive data or cause denial of service via crafted project files.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 19 Oct 2026
- **Updated:** 20 Oct 2026
- **Also known as:** GHSA-g42h-2hmf-m2p6

## What is CVE-2026-104679?

CVE-2026-104679 is a medium-severity vulnerability in Yamaha Corporation VOCALOID6 Editor, published on 19 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

VOCALOID6 Editor provided by Yamaha Corporation improperly restricts XML external entity references. Loading a specially crafted project file may the product to initiate unintended communication, potentially leading to the leak of sensitive information from the device where the product is installed or resulting in a denial-of-service (DoS) condition.

Weakness: CWE-611 (Improper Restriction of XML External Entity Reference)

## Which versions are affected by CVE-2026-104679?


## How do I fix CVE-2026-104679?

No fix has been published for CVE-2026-104679 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-104679 being exploited?

There is no known exploitation of CVE-2026-104679 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-104679 and fix it if it is affected.

What it is: CVE-2026-104679 is a medium-severity vulnerability in Yamaha Corporation VOCALOID6 Editor, published on 19 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-104679 in the wild and no public exploit code.

Affected product: Yamaha Corporation VOCALOID6 Editor. 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-2026-104679/ (Markdown: https://insights.sbomify.com/CVE-2026-104679/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-104679
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-104679
- OSV: https://osv.dev/vulnerability/CVE-2026-104679

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-104679/
Summaries are generated and may contain mistakes; the official description above is the record.