# CVE-2026-4846: dameng100 muucmf autoReply.html cross site scripting

> Remote attackers can execute arbitrary scripts via the keyword argument in autoReply.html, potentially compromising user accounts.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 26 Mar 2026
- **Updated:** 26 Mar 2026
- **Also known as:** GHSA-hxcx-9gwg-xxw5

## What is CVE-2026-4846?

CVE-2026-4846 is a medium-severity cross-site scripting vulnerability in dameng100 muucmf, published on 26 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A vulnerability has been found in dameng100 muucmf 1.9.5.20260309. The affected element is an unknown function of the file channel/admin.Account/autoReply.html. Such manipulation of the argument keyword leads to cross site scripting. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-94 (Improper Control of Generation of Code), CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-4846?


## How do I fix CVE-2026-4846?

No fix has been published for CVE-2026-4846 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-4846 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4846 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-4846 and fix it if it is affected.

What it is: CVE-2026-4846 is a medium-severity cross-site scripting vulnerability in dameng100 muucmf, published on 26 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4846 exists.

Affected product: dameng100 muucmf. 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-2026-4846/ (Markdown: https://insights.sbomify.com/CVE-2026-4846/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-4846
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-4846
- OSV: https://osv.dev/vulnerability/CVE-2026-4846

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-4846/
Summaries are generated and may contain mistakes; the official description above is the record.