CVE-2026-2131 in HarmonyOS-mcp-server
Summary
by MITRE • 02/08/2026
A vulnerability was identified in XixianLiang HarmonyOS-mcp-server 0.1.0. This vulnerability affects the function input_text. The manipulation of the argument text leads to os command injection. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.
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Analysis
by VulDB Data Team • 03/05/2026
The vulnerability CVE-2026-2131 represents a critical command injection flaw in the XixianLiang HarmonyOS-mcp-server version 0.1.0, specifically within the input_text function. This issue stems from inadequate input validation and sanitization mechanisms that fail to properly handle user-supplied text arguments. The vulnerability exists at the application layer where untrusted data enters the system without proper filtering, creating an avenue for malicious actors to execute arbitrary operating system commands on the affected server. The flaw is particularly concerning as it affects a core functionality that processes text input, making it a prime target for exploitation in various attack scenarios.
The technical implementation of this vulnerability follows CWE-77 principles, specifically categorized as command injection due to improper validation of input parameters. When the input_text function processes the text argument, it fails to sanitize or escape special characters that could be interpreted by the underlying operating system shell. Attackers can leverage this weakness by crafting malicious input that includes shell metacharacters such as semicolons, pipes, or backticks, which when processed by the vulnerable function, get executed as legitimate system commands. The remote exploitation capability means that adversaries can trigger this vulnerability from external networks without requiring local access or authentication, significantly expanding the attack surface and potential impact scope.
The operational impact of CVE-2026-2131 extends beyond simple command execution, as it can lead to complete system compromise and unauthorized access to sensitive data. An attacker who successfully exploits this vulnerability can potentially escalate privileges, install persistent backdoors, exfiltrate system information, or disrupt services through destructive command execution. The publicly available exploit further amplifies the risk, as it reduces the technical barrier for threat actors to leverage this weakness. The vulnerability affects the HarmonyOS-mcp-server environment, which likely serves as a middleware component in IoT or embedded systems, making the potential impact particularly severe in connected device ecosystems where such servers may control critical functions.
Mitigation strategies for this vulnerability should include immediate input validation and sanitization of all user-supplied text parameters before processing. Implementing proper parameterized input handling and avoiding direct shell command execution with user input are essential defensive measures. Organizations should also consider employing web application firewalls, network segmentation, and regular security assessments to detect and prevent exploitation attempts. The ATT&CK framework categorizes this vulnerability under T1059.001 for command and script injection techniques, highlighting the need for comprehensive defensive measures including process monitoring and anomaly detection systems. Additionally, the affected server should be updated to a patched version or replaced with a more secure implementation that properly handles text input processing according to secure coding practices and industry standards.