Vulnerability Description
Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. From 2.4.1 until 2.5.1, an authenticated Termix administrator can store attacker-controlled domain and email values through PATCH /users/acme-ssl-settings and trigger their interpolation into a certbot shell command through POST /users/acme-ssl-request. In src/backend/database/routes/acme-ssl-routes.ts, child_process.execSync invokes /bin/sh -c with those values only wrapped in double quotes, so shell metacharacters can execute arbitrary operating-system commands as the Termix backend process. Both HTTP webroot and DNS Cloudflare challenge modes are affected, and compromise exposes Termix databases, process secrets, stored credentials, and network reachability. This issue is fixed in version 2.5.1.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/Termix-SSH/Termix/commit/c7a9063a72071153723e668787548766c971
- https://github.com/Termix-SSH/Termix/commit/ddbdd5c437c2296607dfaa4265d6f63fbc1c
- https://github.com/Termix-SSH/Termix/pull/1067
- https://github.com/Termix-SSH/Termix/releases/tag/release-2.5.1-tag
- https://github.com/Termix-SSH/Termix/security/advisories/GHSA-pr55-25gf-5f9v
- https://github.com/Termix-SSH/Termix/security/advisories/GHSA-pr55-25gf-5f9v
FAQ
What is CVE-2026-79766?
CVE-2026-79766 is a vulnerability with a CVSS score of 9.1 (CRITICAL). Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. From 2.4.1 until 2.5.1, an authenticated Termix administrator can store attacker-controlle...
How severe is CVE-2026-79766?
CVE-2026-79766 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-79766?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.