SxDevOps MCP STDIO Server Management Command Injection
First seen Sep 21, 2026 · Updated Sep 21, 2026 · CVSS 6.6
SxDevOps versions 1.0/1.1 contain a remotely exploitable command injection vulnerability in the MCP STDIO Server Management component. An attacker can manipulate the endpoint_or_command parameter passed to subprocess.Popen to execute arbitrary OS commands. The vendor has already released a patch, and no in-the-wild exploitation was reported.
Technical Analysis
The vulnerability resides in backend/aiops/services.py, where the endpoint_or_command argument is passed unsanitized into subprocess.Popen when spawning MCP STDIO servers. Because MCP STDIO server configuration typically involves specifying a command and arguments to launch a local server process, insufficient input validation on this field allows an attacker to inject shell metacharacters or alternate commands. This crosses the boundary between the orchestration/management layer and the underlying OS, giving the attacker code execution privileges equivalent to the backend process rather than just influencing agent tool behavior. Remote initiation implies the injection point is reachable via an API or web interface used to configure or register MCP servers.
Affected Systems
SxDevOps; protocols: MCP
Detection Signatures
- Monitor subprocess.Popen calls with unsanitized endpoint_or_command values in aiops/services.py
- Look for shell metacharacters (;, |, &&, $(), backticks) in MCP server configuration/registration requests
- Unexpected child processes spawned by the SxDevOps backend service
- Outbound network connections or file writes originating from the MCP STDIO server management process shortly after configuration changes
Remediation Steps
- 1
Apply vendor patch
Upgrade to the fixed SxDevOps release containing commit 2b4bf8585c3e731e7a8af30801ea46680bc783f9.
- 2
Input validation
Sanitize and allow-list the endpoint_or_command parameter; reject shell metacharacters and restrict to known executable paths.
- 3
Avoid shell invocation
Use subprocess.Popen with a list of arguments and shell=False rather than constructing a shell command string.
- 4
Restrict access
Limit who can register or configure MCP STDIO servers via authentication and authorization controls on the management API.
- 5
Sandbox process execution
Run spawned MCP server processes with least privilege, in containers or restricted user contexts, to limit blast radius if injection reoccurs.
CVE / Advisory IDs
Industries Most Exposed
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