Fastmcp Template — the complete, unedited output of the deterministic mcptrustchecker engine v1.9.0, scanned . Every finding, capability tag and score component below is exactly what the engine produced — no AI, no post-processing.
{
"tool": {
"name": "mcptrustchecker",
"version": "1.9.0",
"methodologyVersion": "mcptrustchecker-1.9"
},
"target": {
"id": "fastmcp-template",
"source": {
"kind": "package",
"origin": "fastmcp-template"
},
"server": {
"name": "fastmcp-template"
}
},
"grade": "A",
"score": {
"score": 92,
"threatScore": 100,
"grade": "A",
"band": "A",
"categorySubtotals": {
"injection": 0,
"exfiltration": 0,
"permissions": 0,
"supply-chain": 0,
"network": 0,
"hygiene": 0
},
"vector": [
{
"kind": "client",
"term": "capability-exposure",
"level": "high",
"label": "capability blast radius (high) — client exposure if the model is manipulated",
"appliedPenalty": 6
},
{
"kind": "client",
"term": "verification-discount",
"level": "none",
"label": "publisher verification (unlinked) — no provenance/repo link, but the shipped source was fully read",
"appliedPenalty": 2
},
{
"kind": "client",
"term": "coverage-honesty",
"level": "source",
"label": "inspection depth (source) — how much of the target the scan could see",
"appliedPenalty": 0
}
],
"gatesFired": [],
"methodologyVersion": "mcptrustchecker-1.9"
},
"capability": {
"level": "high",
"reasons": [
"can execute shell commands or code"
],
"tags": [
"code-exec"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (7 recovered), not enumerated from a running server. Tool-poisoning, Unicode-smuggling, capability and toxic-flow analysis ran on this inferred surface, but a mis-parsed registration could be missed or mis-attributed, so tool-derived findings are capped below “confirmed”. To grade the real runtime surface, scan the running server: --command \"npx -y <package>\"."
]
},
"findings": [
{
"ruleId": "MTC-SRC-010",
"title": "Dynamic evaluation of a non-literal value (.agent/files/tmp/session/langfuse_integration.py)",
"category": "injection",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`.agent/files/tmp/session/langfuse_integration.py:886`): Evaluating a runtime value as code (rather than a fixed literal) executes whatever reaches it — a direct RCE primitive, and almost never necessary in legitimate code. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.",
"remediation": "Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.",
"location": {
"kind": "server",
"name": ".agent/files/tmp/session/langfuse_integration.py"
},
"evidence": "y: result = eval(expression, {\"__builtins__\": {}}, safe_context) result_dict = {",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-010",
"file": ".agent/files/tmp/session/langfuse_integration.py",
"line": 886,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-010",
"title": "Dynamic evaluation of a non-literal value (.agent/files/tmp/session/mcp_server.py)",
"category": "injection",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`.agent/files/tmp/session/mcp_server.py:364`): Evaluating a runtime value as code (rather than a fixed literal) executes whatever reaches it — a direct RCE primitive, and almost never necessary in legitimate code. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.",
"remediation": "Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.",
"location": {
"kind": "server",
"name": ".agent/files/tmp/session/mcp_server.py"
},
"evidence": "ontext result = eval(expr, {\"__builtins__\": {}}, SAFE_MATH_CONTEXT) # Handle complex numbers if",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-010",
"file": ".agent/files/tmp/session/mcp_server.py",
"line": 364,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-001",
"title": "Dynamic code execution in server code (.agent/files/tmp/session/langfuse_integration.py)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`.agent/files/tmp/session/langfuse_integration.py:886`): Evaluating strings as code is the most direct RCE primitive; if any tool input reaches it, the server executes attacker-chosen code. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.",
"remediation": "Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.",
"location": {
"kind": "server",
"name": ".agent/files/tmp/session/langfuse_integration.py"
},
"evidence": "y: result = eval(expression, {\"__builtins__\": {}}, safe_context) result_dict = {",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-001",
"file": ".agent/files/tmp/session/langfuse_integration.py",
"line": 886,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-001",
"title": "Dynamic code execution in server code (.agent/files/tmp/session/mcp_server.py)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`.agent/files/tmp/session/mcp_server.py:364`): Evaluating strings as code is the most direct RCE primitive; if any tool input reaches it, the server executes attacker-chosen code. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.",
"remediation": "Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.",
"location": {
"kind": "server",
"name": ".agent/files/tmp/session/mcp_server.py"
},
"evidence": "ontext result = eval(expr, {\"__builtins__\": {}}, SAFE_MATH_CONTEXT) # Handle complex numbers if",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-001",
"file": ".agent/files/tmp/session/mcp_server.py",
"line": 364,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SUP-012",
"title": "Package has no license",
"category": "hygiene",
"severity": "info",
"confidence": "strong",
"description": "\"fastmcp-template\" has no declared license. This is a legal/reuse concern, not a security finding.",
"location": {
"kind": "package",
"name": "fastmcp-template"
}
},
{
"ruleId": "MTC-SUP-011",
"title": "Package declares no source repository",
"category": "supply-chain",
"severity": "info",
"confidence": "strong",
"description": "\"fastmcp-template\" declares no repository URL, so its published artifact cannot be compared against reviewable source.",
"remediation": "Prefer packages that link to public, reviewable source.",
"location": {
"kind": "package",
"name": "fastmcp-template"
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "enable_test_context",
"tags": [],
"reasons": {}
},
{
"tool": "set_test_context",
"tags": [],
"reasons": {}
},
{
"tool": "reset_test_context",
"tags": [],
"reasons": {}
},
{
"tool": "calculate",
"tags": [],
"reasons": {}
},
{
"tool": "store_secret",
"tags": [],
"reasons": {}
},
{
"tool": "get_user_profile",
"tags": [],
"reasons": {}
},
{
"tool": "store_user_data",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "7174329ef18a6200b596307b49e822d99d5576abc57bc2121f0249960e3a0595",
"stats": {
"tools": 7,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 4,
"medium": 0,
"low": 0,
"info": 2
}
}
}