Vulnerability · Published Aug 19, 2026 · Assigned by GitHub_M

CVE-2026-53545Termix: Remote Code Execution via Tunnel Disconnect pkill Command Injection

Critical 9.8

In plain English

A critical-severity OS command injection in Termix from Termix-SSH. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.7%top 45.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
Termix-SSH	Termix	< 2.3.2

Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

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