Navvi — the complete, unedited output of the deterministic mcptrustchecker engine v1.13.0, scanned . Every finding, capability tag and score component below is exactly what the engine produced — no AI, no post-processing.
{
"tool": {
"name": "mcptrustchecker",
"version": "1.13.0",
"methodologyVersion": "mcptrustchecker-1.13"
},
"target": {
"id": "navvi",
"source": {
"kind": "package",
"origin": "navvi"
},
"server": {
"name": "navvi"
}
},
"grade": "A",
"score": {
"score": 93,
"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": "repo",
"label": "publisher verification (public source) — no provenance, but the source is public and inspectable",
"appliedPenalty": 1
},
{
"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-1.13"
},
"capability": {
"level": "high",
"reasons": [
"ingests untrusted external content (a prompt-injection entry point)",
"can execute shell commands or code"
],
"tags": [
"untrusted-input",
"code-exec"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (31 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-002",
"title": "Shell/command execution in server code (container/navvi-server.py)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`container/navvi-server.py:79`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. 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": "container/navvi-server.py"
},
"evidence": "lly, then force subprocess.run([\"pkill\", \"-TERM\", \"camoufox-bin\"], timeout=3, capture_output=True) for _",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "container/navvi-server.py",
"line": 79,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (src/navvi/__init__.py)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`src/navvi/__init__.py:356`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. 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": "src/navvi/__init__.py"
},
"evidence": "try: result = subprocess.run( cmd, shell=True, capture_output=True, text=True, timeout=timeout",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "src/navvi/__init__.py",
"line": 356,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (src/navvi/flows.py)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`src/navvi/flows.py:251`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. 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": "src/navvi/flows.py"
},
"evidence": "try: result = subprocess.run( [claude_path, \"-p\", prompt], capture_output=True,",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "src/navvi/flows.py",
"line": 251,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (src/navvi/recaptcha.py)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`src/navvi/recaptcha.py:236`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. 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": "src/navvi/recaptcha.py"
},
"evidence": "NT\")} result = subprocess.run( [\"claude\", \"-p\", prompt, \"--allowedTools\", \"Read\"], env=",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "src/navvi/recaptcha.py",
"line": 236,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (src/navvi/vision.py)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`src/navvi/vision.py:213`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. 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": "src/navvi/vision.py"
},
"evidence": "} result = subprocess.run( [\"claude\", \"-p\", prompt, \"--allowedTools\", \"Read\"], env=",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "src/navvi/vision.py",
"line": 213,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SUP-012",
"title": "Package has no license",
"category": "hygiene",
"severity": "info",
"confidence": "strong",
"description": "\"navvi\" has no declared license. This is a legal/reuse concern, not a security finding.",
"location": {
"kind": "package",
"name": "navvi"
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "navvi_persona",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_account",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_milestone",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_context",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_start",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_stop",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_status",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_list",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_open",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_click",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_fill",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_press",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_drag",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_hold",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_mousedown",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_mouseup",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_mousemove",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_scroll",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_screenshot",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_url",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_vnc",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_find",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_creds",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_tab",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_record_start",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_record_stop",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_record_gif",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_atomic",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_flow",
"tags": [],
"reasons": {}
},
{
"tool": "navvi_browse",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"browse\""
]
}
},
{
"tool": "navvi_login",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "0f965610eac81190c724f63684f31249ca1c0179396b80d21e2e837292788ee5",
"stats": {
"tools": 31,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 5,
"medium": 0,
"low": 0,
"info": 1
}
}
}