# CVE-2026-124003: Dixell/Copeland XWEB Setuid Lua CGI Root Command Injection

> Attackers can inject commands via a setuid-root Lua CGI on XWEB EVO, executing as root; the product is end-of-service.

- **Severity:** High 8.5 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Harmful if only installed:** No
- **Needs a specific call:** No
- **Fix available:** No
- **Published:** 12 Nov 2026
- **Updated:** 12 Nov 2026
- **Also known as:** GHSA-r68m-c6rg-86pf

## What is CVE-2026-124003?

CVE-2026-124003 is a high-severity command injection vulnerability in Copeland XWEB EVO, published on 12 Nov 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

XWEB EVO before 5.6.2 contains a command injection vulnerability where the setuid-root Lua CGI interpreter wlua executes system("/usr/bin/lua "+argv) on unsanitized input. Attackers can craft malicious input reached through a .lua CGI endpoint to inject arbitrary commands into the concatenated argv string, achieving command execution with root privileges. This product line reached it's end of service date in March 2026.

Weakness: CWE-250 (Execution with Unnecessary Privileges)

## Which versions are affected by CVE-2026-124003?

An affected version is exposed as installed. No special setting or call is needed.


## How do I fix CVE-2026-124003?

No fix has been published for CVE-2026-124003 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-124003 being exploited?

There is no known exploitation of CVE-2026-124003 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-124003 and fix it if it is affected.

What it is: CVE-2026-124003 is a high-severity command injection vulnerability in Copeland XWEB EVO, published on 12 Nov 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-124003 in the wild and no public exploit code.
Exposure: An affected version is exposed as installed. No special setting or call is needed.

Affected product: Copeland XWEB EVO. 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-2026-124003/ (Markdown: https://insights.sbomify.com/CVE-2026-124003/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-124003
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-124003
- OSV: https://osv.dev/vulnerability/CVE-2026-124003

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-124003/
Summaries are generated and may contain mistakes; the official description above is the record.