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Input validation vulnerabilities in Model Context Protocol (MCP) servers typically arise when untrusted data or parameters passed from AI clients are processed without proper sanitization, type checking, or boundary validation. In reconnaissance and vulnerability intelligence tools like mcp-shodan that interface directly with external APIs and local configuration files, inadequate input validation allows malicious payloads to manipulate query parameters or trigger configuration loader anomalies. When configuration loaders lack robust parsing checks, adversaries can exploit parsing discrepancies to inject unauthorized directives or override sensitive environment variables. Furthermore, unvalidated inputs passed to network scanning or CVE lookup functions can lead to injection vectors, unexpected exceptions, or denial-of-service conditions during server startup and runtime execution. The recent updates in version 2.8.138 and surrounding releases address these architectural weaknesses by introducing rigorous input sanitization routines, streamlining the configuration loading mechanism, and optimizing startup stability to ensure secure handling of remote intelligence data.
DailyCVE Form:
Platform: mcp-shodan server
Version: 2.8.138 release
Vulnerability: Input validation flaw
Severity: Medium risk
date: March 2026
Prediction: Already patched now
What Undercode Say:
Bash Commands and Codes
git clone https://github.com/dorothyhedlund512/mcp-shodan cd mcp-shodan npm install npm run build export SHODAN_API_KEY="your-api-key" npm start
Exploit: (Educational Purposes!)
// Conceptual demonstration of unvalidated input handling in MCP parameters
const maliciousQuery = "../../../etc/passwd";
const response = await mcpClient.callTool("cve_lookup", { cve: maliciousQuery });
Protection: from this CVE
Update mcp-shodan to version 2.8.138 or later.
Enable strict input validation and sanitization filters.
Secure configuration files and restrict environment variable access.
Regularly monitor GitHub releases for security patches.
Impact:
Unauthorized parameter manipulation.
Potential configuration tampering.
Service disruption during startup.
Information disclosure risks.
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Sources:
Reported By: github.com
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