CVE-2026-53545

CRITICAL 9.8

Termix: Remote Code Execution via Tunnel Disconnect pkill Command Injection

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-78
Vendor	termix-ssh
Product	termix
Published	Aug 19, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Termix-SSH / Termix

< 2.3.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/Termix-SSH/Termix/security/advisories/GHSA-5p86-jgr7-4hwx github.com: https://github.com/Termix-SSH/Termix/pull/874 github.com: https://github.com/Termix-SSH/Termix/commit/52f4e51ae03b5b8d2608e1383e2ccf79d290132b github.com: https://github.com/Termix-SSH/Termix/releases/tag/release-2.3.2-tag