CVE-2026-53545 Termix: Remote Code Execution via Tunnel Disconnect pkill Command Injection
An authenticated user can execute arbitrary commands on the SSH host by injecting shell commands into tunnel disconnect parameters.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-53545?
CVE-2026-53545 is a critical command injection vulnerability in Termix-SSH Termix, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-78
Which versions are affected by CVE-2026-53545?
How do I fix CVE-2026-53545?
No fix has been published for CVE-2026-53545 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-53545 being exploited?
There is no known exploitation of CVE-2026-53545 in the wild and no public exploit code.
Sources
Also known as GHSA-5p86-jgr7-4hwx.