CVE-2026-125391 Webmin through 2.670 OS Command Injection via Samba User Account Options
High 8.6
Published
Updated
Check this codebase for CVE-2026-125391 and fix it if it is affected.
What it is: CVE-2026-125391 is a high-severity vulnerability in webmin, published on 9 Nov 2026.
Exploitation: There is no known exploitation of CVE-2026-125391 in the wild and no public exploit code.
Affected product: webmin. 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-2026-125391/ (Markdown: https://insights.sbomify.com/CVE-2026-125391/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-125391?
CVE-2026-125391 is a high-severity vulnerability in webmin, published on 9 Nov 2026.
Official description
Webmin through 2.670 contains an OS command injection vulnerability in samba/save_euser.cgi that allows authenticated Samba user maintainers to inject commands via unvalidated opts parameter. Attackers can embed shell metacharacters in account option flags passed by create_user and modify_user to backquote_logged, executing commands as root.
Weakness: CWE-78
Which versions are affected by CVE-2026-125391?
How do I fix CVE-2026-125391?
No fix has been published for CVE-2026-125391 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-125391 being exploited?
There is no known exploitation of CVE-2026-125391 in the wild and no public exploit code.
Sources
Also known as GHSA-wc4p-j42q-3r22.