aws-docs-mcp-server

Kenblair1226cloud-infraTypeScript
GitHub
0Tools
17Findings
0Stars
Mar 24, 2026Last Scanned
⚠3 critical · 12 high · 1 medium · 1 low findings detected

Security Category Deep Dive

⚡
Prompt Injection
Prompt & context manipulation attacks
69
Maturity
14
Rules
5
Sub-Categories
1
Gaps
64%
Implemented
56
Tests
1
Stories
PI-DIRDirect Input Injection
100%3 rules
Injection via tool descriptions and parameter fields
GAP-001Prompt Injection Coverage GapMissing detection coverage for emerging prompt injection attack variants not addressed by current rules
PI-INDIndirect / Gateway Injection
100%4 rules
Hidden instructions via external content and tool responses
PI-CTXContext Manipulation
100%2 rules
Context window saturation and prior-approval exploitation
PI-ENCEncoding & Obfuscation
100%3 rules
Payload hiding via invisible chars, base64, schema fields
PI-TPLTemplate & Output Poisoning
50%2 rules1 found
Injection via prompt templates and runtime tool output
Framework Coverage
OWASP MCP Top 1014/14
MITRE ATLAS14/14
CoSAI MCP2/14
OWASP Agentic Top 1012/14
Kill Chain Phases
1Initial Access
1Defense Evasion
1Execution
1Persistence

Findings17

3critical
12high
1medium
1low

Critical3

criticalN11Protocol Version Downgrade AttackMCP07-insecure-configAML.T0054
Pattern "(?:protocolVersion|protocol_version)\s*[:=]\s*['"](?:2024-11-05|1\.0|0\.)['"]" matched in source_code: "protocol_version: '2024-11-05'" (at position 452)
Enforce a minimum protocol version during the initialize handshake. The 2024-11-05 spec lacks tool annotations, elicitation, and transport session security — downgrading to it strips safety features added in 2025-03-26 and 2025-06-18. Reject connections requesting protocol versions below your minimum supported version. Never echo back the client-requested version without validation.
criticalQ13MCP Bridge Package Supply Chain AttackMCP10-supply-chainAML.T0054
Pattern "["']@modelcontextprotocol/sdk["']\s*:\s*["'](?:\^|~|\*|latest)" matched in source_code: ""@modelcontextprotocol/sdk": "^" (at position 13597)
MCP bridge packages (mcp-remote, mcp-proxy, @modelcontextprotocol/sdk, fastmcp) are high-value supply chain targets — CVE-2025-6514 (CVSS 9.6) in mcp-remote affected 437,000+ installs. Always pin exact versions (no ^ or ~ ranges). Use lockfiles (package-lock.json, pnpm-lock.yaml, uv.lock). Never run `npx mcp-remote` without version pinning. Verify package integrity with `npm audit` or `pip-audit` before deployment. Reference: CVE-2025-6514, OWASP ASI04.
criticalC1Command InjectionMCP03-command-injectionAML.T0054
Pattern "`[^`]+`" matched in source_code: "`${counter++}. $1\n`" (at position 4240)
Replace exec()/execSync() with execFile() and pass arguments as an array, never as a string. Validate all inputs against an allowlist before use in any shell context. For subprocess.run, always pass a list and shell=False.

High12

highC3Server-Side Request Forgery (SSRF)MCP04-data-exfiltrationAML.T0057
Pattern "\bfetch\s*\(\s*(?:req|request|input|param|params|args|url|uri|href|link|target|destination|endpoint|host|address|resource|src|source|location|proxy|callback|userUrl|user_url|externalUrl|external_url|redirectUrl|redirect_url)" matched in source_code: "fetch(url" (at position 6474)
Validate ALL user-supplied URLs before making HTTP requests: 1. Parse the URL and check the hostname against an explicit allowlist of permitted domains. 2. Block requests to RFC 1918 private ranges: 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16. 3. Block loopback (127.0.0.0/8), link-local (169.254.0.0/16), and IPv6 equivalents. 4. Block file:// and other non-http(s) protocols explicitly. 5. Disable automatic redirect following, or re-validate each redirect destination. 6. In cloud environments: block requests to IMDS endpoints (169.254.169.254, metadata.google.internal) at both the application AND network layer. Example (Node.js): Use the `ssrf-req-filter` package or implement URL validation against an allowlist before calling fetch/axios/got.
highC7Wildcard CORSMCP07-insecure-config
Pattern "cors\s*\(\s*\{[^}]*origin\s*:\s*['"]\*['"]" matched in source_code: "cors({ origin: '*'" (at position 156)
Replace wildcard CORS with an explicit allowlist of permitted origins. Wildcard CORS allows any website to make requests to the MCP server.
highD1Known CVEs in DependenciesMCP08-dependency-vuln
Dependency "@modelcontextprotocol/sdk@1.15.1" has known CVEs:
Update dependencies to versions that patch known CVEs. Run 'npm audit fix' or 'pip-audit' to identify and resolve vulnerable dependencies.
highD1Known CVEs in DependenciesMCP08-dependency-vuln
Dependency "hono@4.6.11" has known CVEs:
Update dependencies to versions that patch known CVEs. Run 'npm audit fix' or 'pip-audit' to identify and resolve vulnerable dependencies.
highJ5Tool Output Poisoning PatternsMCP01-prompt-injectionAML.T0054
[AST — J5] Catch block at L270 interpolates error variable "error" into response. If the error originates from attacker-controlled input (e.g., malformed data), the error message becomes an injection vector into the AI's context.
Never include user input or LLM manipulation directives in error messages or tool responses. Use structured error codes.
highK16Unbounded Recursion / Missing Depth LimitsMCP07-insecure-configAML.T0054
Pattern "function\s+(\w+).*\{[^}]*\1\s*\((?!.*(?:depth|level|limit|max|count|recursi))" matched in source_code: "function extractContentFromHtml(html: string): string { try { let markdown = html; // Remove script and style tags markdown = markdown.replace(/<script[^>]*>[\s\S]*?<\/script>/gi, ''); markdown = markdown.replace(/<style[^>]*>[\s\S]*?<\/style>/gi, ''); markdown = markdown.replace(/<noscript[^>]*>[\s\S]*?<\/noscript>/gi, ''); // Convert headers markdown = markdown.replace(/<h1[^>]*>(.*?)<\/h1>/gi, '# $1\n\n'); markdown = markdown.replace(/<h2[^>]*>(.*?)<\/h2>/gi, '## $1\n\n'); markdown = markdown.replace(/<h3[^>]*>(.*?)<\/h3>/gi, '### $1\n\n'); markdown = markdown.replace(/<h4[^>]*>(.*?)<\/h4>/gi, '#### $1\n\n'); markdown = markdown.replace(/<h5[^>]*>(.*?)<\/h5>/gi, '##### $1\n\n'); markdown = markdown.replace(/<h6[^>]*>(.*?)<\/h6>/gi, '###### $1\n\n'); // Convert paragraphs markdown = markdown.replace(/<p[^>]*>(.*?)<\/p>/gi, '$1\n\n'); // Convert line breaks markdown = markdown.replace(/<br\s*\/?>/gi, '\n'); // Convert links markdown = markdown.replace(/<a[^>]*href="([^"]*)"[^>]*>(.*?)<\/a>/gi, '[$2]($1)'); // Convert bold and italic markdown = markdown.replace(/<strong[^>]*>(.*?)<\/strong>/gi, '**$1**'); markdown = markdown.replace(/<b[^>]*>(.*?)<\/b>/gi, '**$1**'); markdown = markdown.replace(/<em[^>]*>(.*?)<\/em>/gi, '*$1*'); markdown = markdown.replace(/<i[^>]*>(.*?)<\/i>/gi, '*$1*'); // Convert unordered lists markdown = markdown.replace(/<ul[^>]*>([\s\S]*?)<\/ul>/gi, (match, content) => { return content.replace(" (at position 2425)
Add explicit depth/recursion limits to all recursive operations. Use iterative approaches where possible. Set maximum depth for directory walking (max_depth=10), tree traversal (max_level=20), and agent re-invocation (max_calls=5). Implement circuit breakers that halt after N iterations. Required by EU AI Act Art. 15 (robustness) and OWASP ASI08.
highK18Cross-Trust-Boundary Data Flow in Tool ResponseMCP04-data-exfiltrationAML.T0054
Pattern "(?:webhook|http|fetch|axios|post|send|email).*(?:readFile|read_file|query|select|getSecret|credential|password)" matched in source_code: "https://docs.aws.amazon.com/search.html?searchPath=documentation&searchQuery" (at position 8416)
Implement data flow taint tracking: tag data from sensitive sources (databases, credentials, files) and prevent it from flowing to external sinks (HTTP, webhooks, email) without explicit sanitization/redaction. Apply data classification and enforce boundary controls per trust level. Required by ISO 27001 A.5.14 and CoSAI MCP-T5.
highK4Missing Human Confirmation for Destructive OpsMCP06-excessive-permissionsAML.T0054
Pattern "(delete|remove|drop|truncate|destroy|purge|wipe|erase).*(?:execute|run|perform|call)(?!.*(?:confirm|approve|prompt|ask|verify|consent))" matched in source_code: "truncated. Call" (at position 7902)
All destructive operations (delete, drop, overwrite, send) MUST include a human confirmation step. Use the MCP destructiveHint annotation to signal that client-side confirmation is required. Implement an approval gate pattern: preview changes → request confirmation → execute. Required by ISO 42001 A.9.1, EU AI Act Art. 14, and NIST AI RMF GOVERN 1.7.
highD1Known CVEs in DependenciesMCP08-dependency-vuln
Dependency "wrangler@4.21.0" has known CVEs:
Update dependencies to versions that patch known CVEs. Run 'npm audit fix' or 'pip-audit' to identify and resolve vulnerable dependencies.
highJ5Tool Output Poisoning PatternsMCP01-prompt-injectionAML.T0054
[AST — J5] Catch block at L291 interpolates error variable "error" into response. If the error originates from attacker-controlled input (e.g., malformed data), the error message becomes an injection vector into the AI's context.
Never include user input or LLM manipulation directives in error messages or tool responses. Use structured error codes.
highJ5Tool Output Poisoning PatternsMCP01-prompt-injectionAML.T0054
[AST — J5] Catch block at L314 interpolates error variable "error" into response. If the error originates from attacker-controlled input (e.g., malformed data), the error message becomes an injection vector into the AI's context.
Never include user input or LLM manipulation directives in error messages or tool responses. Use structured error codes.
highO6Server Fingerprinting via Error ResponsesMCP04-data-exfiltrationAML.T0057
Pattern "(?:diagnostics?|debug|system_?info|server_?info|health_?detailed|status_?detail)\s*[:=]\s*\{[^}]*(?:version|os|arch|platform|uptime|memory|cpu|disk|hostname|pid)" matched in source_code: "SERVER_INFO = { name: 'AWS Documentation MCP Server', version: '1.1.0', description: 'AWS Documentation MCP Server for Cloudflare Workers', protocol_version" (at position 304)
Never expose process, OS, runtime, or database metadata in tool responses or error messages. Use generic error messages ("An error occurred") for production responses. Remove or disable debug/diagnostic endpoints. If health endpoints are needed, limit them to simple "ok"/"error" status without infrastructure details. Wrap all error handlers with a sanitization layer that strips system information.

Medium1

mediumK17Missing Timeout or Circuit BreakerMCP07-insecure-configAML.T0054
Pattern "(?:fetch|axios|got|request|urllib|httpx|http\.get|http\.post)\s*\((?!.*(?:timeout|signal|AbortSignal|deadline|cancel))" matched in source_code: "fetch(" (at position 6474)
Add timeouts to ALL external calls: HTTP requests (30s), database queries (10s), subprocess execution (60s), and MCP tool calls (30s). Implement circuit breakers that open after N consecutive failures (e.g., opossum, cockatiel). Use AbortSignal for cancellable operations. Required by EU AI Act Art. 15 and OWASP ASI08.

Low1

lowF4MCP Spec Non-ComplianceMCP07-insecure-config
Server fails MCP spec compliance checks: required:server_name; required:server_version; required:protocol_version; recommended:tool_descriptions; recommended:parameter_descriptions
Follow the MCP specification for server metadata. Include server name, version, and protocol version. Provide descriptions for all tools and parameters.
aws-docs-mcp-server Security Report — MCP Sentinel