CVE-2026-53545: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in Termix-SSH Termix
Description
CVE-2026-53545 is a critical OS command injection vulnerability in Termix, a web-based server management platform. The flaw exists in versions prior to 2.3.2 in the DELETE /ssh/tunnel/disconnect/:tunnelName endpoint, where user-controlled input is improperly sanitized and interpolated into shell commands. An authenticated user able to edit tunnel host fields can inject arbitrary shell commands that execute with the privileges of the connected SSH account when the tunnel disconnects. This allows remote command execution on the source SSH host. The issue is fixed in Termix version 2.3.2.
CVSS v3.1
Score 9.8critical
Affected software
Termix-SSH
Termix
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Termix versions before 2.3.2 contain an OS command injection vulnerability (CWE-78) in the tunnel disconnect functionality. The DELETE /ssh/tunnel/disconnect/:tunnelName path in src/backend/ssh/tunnel.ts interpolates endpointPort, sourcePort, endpointUsername, and endpointIP into single-quoted pkill -f patterns without proper sanitization. An attacker with authentication and tunnel host editing permissions can inject a single quote to break out of the quoted pattern and append arbitrary shell commands. These commands execute on the source SSH host with the privileges of the connected SSH user upon tunnel disconnection. The vulnerability is resolved in version 2.3.2.
Potential Impact
Successful exploitation allows an authenticated attacker to execute arbitrary commands on the source SSH host with the privileges of the connected SSH account. This can lead to full compromise of the host depending on the SSH account's privileges. The CVSS 3.1 score is 9.8 (critical), reflecting the high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade Termix to version 2.3.2 or later, where this vulnerability is fixed. No other mitigations are specified. Since this is not a cloud service, remediation depends on applying the official patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-09T18:13:07.263Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a861420acd9273b4997c7d3
Added to database: 08/19/2026, 20:37:52 UTC
Last enriched: 09/11/2026, 05:16:49 UTC
Last updated: 10/04/2026, 10:02:28 UTC
Views: 69
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