Termix-SSH Termix up to 2.3.1 SSH Tunnel tunnel.ts tunnelName os command injection

Summaryinfo

A vulnerability classified as critical was found in Termix-SSH Termix up to 2.3.1. This affects an unknown part of the file src/backend/ssh/tunnel.ts of the component SSH Tunnel. Such manipulation of the argument tunnelName leads to os command injection. This vulnerability is listed as CVE-2026-53545. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Termix-SSH Termix up to 2.3.1. Affected by this issue is an unknown function of the file src/backend/ssh/tunnel.ts of the component SSH Tunnel. The manipulation of the argument tunnelName with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. Prior to 2.3.2, the DELETE /ssh/tunnel/disconnect/:tunnelName teardown path in src/backend/ssh/tunnel.ts interpolates endpointPort, sourcePort, endpointUsername, and endpointIP into single-quoted pkill -f patterns. An authenticated user who can edit a tunnel host field can include a single quote to terminate the pattern and append a shell command, which executes when the tunnel is disconnected. Successful exploitation runs arbitrary commands on the source SSH host with the privileges of the connected SSH account. This issue is fixed in version 2.3.2.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-53545 since 06/09/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1202.

Upgrading to version 2.3.2 eliminates this vulnerability.

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Productinfo

Type

• SSH Server Software

Vendor

• Termix-SSH

Name

• Termix

Version

• 2.3.0
• 2.3.1

Website

• Product: https://github.com/Termix-SSH/Termix/

CPE 2.3info

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CPE 2.2info

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