# CVE-2026-42454: Termix-SSH Termix OS command injection in Docker management endpoints

Source: https://junglewise.ai/threats/cve-2026-42454-termix-ssh-termix-os-command-injection-in-docker-management  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-08. Updated: 2026-07-25  
License: CC BY 4.0 with a link back

CVE-2026-42454 · Severity: critical · CVSS 9.9 · Published 2026-05-08

Termix is a web-based platform used by administrators to manage remote servers through SSH and Docker. A security flaw allows an authorized user to take complete control of any server managed by the platform by sending specially crafted commands. This could lead to the theft of sensitive data, service outages, or the use of corporate infrastructure for malicious activities.

Technologies: [Termix-SSH Termix](https://junglewise.ai/threats/technologies/termix). Vendors: [Termix-SSH](https://junglewise.ai/threats/vendors/termix-ssh).

## Quick answers

**Is CVE-2026-42454 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-42454 being exploited in the wild.

**How severe is CVE-2026-42454?** Critical severity, with a CVSS score of 9.9, published 8 May 2026.

**Which products and versions are affected?** Termix-SSH Termix < 2.1.0.

**Is there a fix for CVE-2026-42454?** A patch was published on 2026-04-22: Version 2.1.0 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-42454 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-42454?** Check whether you run Termix-SSH Termix at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

Termix prior to version 2.1.0 contains an OS command injection vulnerability in its Docker management functionality. The application fails to sanitize the 'containerId' URL path parameter and WebSocket message fields before interpolating them into shell commands executed via the ssh2.Client.exec() method on remote servers. An authenticated attacker with low privileges can exploit this by crafting a malicious container ID (e.g., using shell metacharacters like $()) to execute arbitrary commands with the privileges of the SSH user, which is frequently root. The vulnerability affects 12 different endpoints across the REST API and WebSocket handlers. This issue is resolved in version 2.1.0 by implementing input validation.

## Affected products

- Termix-SSH Termix < 2.1.0

## Timeline

- 2026-04-22: patched: Version 2.1.0 released
- 2026-04-22: advisory: GitHub Security Advisory published
- 2026-05-08: disclosed: CVE published to NVD

## References

- [https://github.com/Termix-SSH/Termix/releases/tag/release-2.1.0-tag](https://github.com/Termix-SSH/Termix/releases/tag/release-2.1.0-tag)
- [https://github.com/Termix-SSH/Termix/security/advisories/GHSA-c2g2-hqgq-6w9v](https://github.com/Termix-SSH/Termix/security/advisories/GHSA-c2g2-hqgq-6w9v)

## Related threats

- [Termix file-manager path traversal in transferToHost](https://junglewise.ai/threats/cve-2026-120322-a-vulnerability-was-identified-in-termix-ssh-termix-up-to-2-9-2)
- [Termix command injection in ACME SSL settings](https://junglewise.ai/threats/cve-2026-79766-termix-is-a-web-based-server-management-platform-with-ssh)
- [Termix server management platform SSRF via proxy endpoint](https://junglewise.ai/threats/cve-2026-79764-termix-is-a-web-based-server-management-platform-with-ssh)
- [Termix two-factor authentication bypass in TOTP disable endpoints](https://junglewise.ai/threats/cve-2026-79763-termix-is-a-web-based-server-management-platform-with-ssh)
- [Termix weak key derivation in OIDC and WebAuthn user encryption](https://junglewise.ai/threats/cve-2026-79762-termix-is-a-web-based-server-management-platform-with-ssh)