CVE-2026-2131
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary operating system commands on systems running XixianLiang HarmonyOS-mcp-server 0.1.0. Attackers can exploit the input_text function by injecting malicious commands through the text parameter. This affects any deployment of the vulnerable software version.
💻 Affected Systems
- XixianLiang HarmonyOS-mcp-server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attackers to execute arbitrary commands, install malware, exfiltrate data, or pivot to other systems.
Likely Case
Remote code execution leading to data theft, service disruption, or installation of backdoors.
If Mitigated
Limited impact if proper input validation and command sanitization are implemented.
🎯 Exploit Status
Exploit details are publicly available in GitHub repository, making exploitation straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None found
Restart Required: Yes
Instructions:
1. Check for updated version from vendor. 2. If no patch, consider workarounds or alternative software. 3. Restart service after any changes.
🔧 Temporary Workarounds
Input Validation Filter
allImplement strict input validation to reject any text containing shell metacharacters or suspicious patterns.
# Example Python input validation
import re
safe_pattern = re.compile(r'^[a-zA-Z0-9\s.,!?-]+$')
if not safe_pattern.match(user_input):
raise ValueError('Invalid input')
Network Access Restriction
linuxRestrict network access to the service using firewall rules.
# Linux iptables example
iptables -A INPUT -p tcp --dport [SERVER_PORT] -s [TRUSTED_IP] -j ACCEPT
iptables -A INPUT -p tcp --dport [SERVER_PORT] -j DROP
🧯 If You Can't Patch
- Disable or remove the HarmonyOS-mcp-server service entirely.
- Implement network segmentation to isolate the vulnerable system from critical assets.
🔍 How to Verify
Check if Vulnerable:
Check if HarmonyOS-mcp-server version 0.1.0 is installed and running.Check Version:
Check package manager or service configuration for version information.Verify Fix Applied:
Verify the service is no longer running version 0.1.0 or has been removed.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns
- Suspicious text input containing shell metacharacters
- Failed input validation attempts
Network Indicators:
- Unexpected outbound connections from the server
- Traffic to known malicious IPs
SIEM Query:
source="harmonyos-mcp-server" AND (text="*;*" OR text="*|*" OR text="*`*" OR text="*$(*")