# CVE-2026-42454: Termix: OS Command Injection in Docker Container Management Endpoints

> An authenticated attacker can inject OS commands via container IDs in Termix, achieving remote code execution on managed servers.

- **Severity:** Critical 9.9 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 May 2026
- **Updated:** 14 May 2026
- **Also known as:** GHSA-c2g2-hqgq-6w9v

## What is CVE-2026-42454?

CVE-2026-42454 is a critical command injection vulnerability in Termix-SSH Termix, published on 8 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. Prior to version 2.1.0, all Docker container management endpoints in Termix interpolate the containerId URL path parameter and WebSocket message field directly into shell commands executed via ssh2.Client.exec() on remote managed servers without any sanitization or validation. An authenticated attacker can inject arbitrary OS commands by crafting a malicious container ID, achieving Remote Code Execution on any managed server. This issue has been patched in version 2.1.0.

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

## Which versions are affected by CVE-2026-42454?


## How do I fix CVE-2026-42454?

No fix has been published for CVE-2026-42454 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-42454 being exploited?

There is no known exploitation of CVE-2026-42454 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-42454 and fix it if it is affected.

What it is: CVE-2026-42454 is a critical command injection vulnerability in Termix-SSH Termix, published on 8 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-42454 in the wild and no public exploit code.

Affected product: Termix-SSH Termix. 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-2026-42454/ (Markdown: https://insights.sbomify.com/CVE-2026-42454/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-42454
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-42454
- OSV: https://osv.dev/vulnerability/CVE-2026-42454

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-42454/
Summaries are generated and may contain mistakes; the official description above is the record.