🛡️ Sentinel: Add standard HTTP security headers #47
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- Add X-Frame-Options: DENY - Add X-Content-Type-Options: nosniff - Add Content-Security-Policy: default-src 'self' - Add Strict-Transport-Security (HSTS) with localhost exclusion - Verify via reproduction test case This enhances the default security posture of the MCP server against clickjacking, MIME sniffing, and insecure connections.
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🛡️ Sentinel: [Security Enhancement]
🚨 Severity: MEDIUM
💡 Vulnerability: Missing standard HTTP security headers (X-Frame-Options, HSTS, CSP, etc.)
🎯 Impact: Increases risk of clickjacking, MIME sniffing attacks, and downgrade attacks.
🔧 Fix: Added a middleware to
src/http-transport.tsthat injects these headers on every response.✅ Verification: Created a reproduction test case
src/repro-security-headers.test.ts(now deleted) that confirmed headers are present and HSTS is correctly skipped for localhost. Existing tests insrc/http-transport.test.tsalso pass.PR created automatically by Jules for task 1154938676135276516 started by @davidruzicka