Termix: OS command injection in ACME/Let's Encrypt certificate-request handler via admin-controlled domain/email

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-79766
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-24 17:17:06 UTC
Updated2026-09-29 03:17:18 UTC
DescriptionTermix 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.

Risk And Classification

Primary CVSS: v3.1 9.1 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

EPSS: 0.003880000 probability, percentile 0.302610000 (date 2026-09-29)

Problem Types: CWE-78 | CWE-78 CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
3.1CNADECLARED9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Termix-SSH Termix affected >= 2.4.1, < 2.5.1 Not specified

References

ReferenceSourceLinkTags
github.com/Termix-SSH/Termix/commit/c7a9063a72071153723e668787548766c971... [email protected] github.com
github.com/Termix-SSH/Termix/pull/1067 [email protected] github.com
github.com/Termix-SSH/Termix/releases/tag/release-2.5.1-tag [email protected] github.com
github.com/Termix-SSH/Termix/commit/ddbdd5c437c2296607dfaa4265d6f63fbc1c... [email protected] github.com
github.com/Termix-SSH/Termix/security/advisories/GHSA-pr55-25gf-5f9v 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
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