RCE in Termix-Ssh Termix
CVE-2026-42454
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.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.007 (48.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Termix-ssh Termix — versions < 2.1.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2026-42454?
- CVE-2026-42454 is a critical-severity vulnerability in Termix-Ssh Termix, classified under OS Command Injection. CVSS score: 9.9/10. Published 2026-05-08.
- How severe is CVE-2026-42454?
- Critical severity. CVSS v3 base score is 9.9 out of 10.