Kernle — 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": "kernle",
"source": {
"kind": "package",
"origin": "kernle"
},
"server": {
"name": "kernle"
}
},
"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-1.9"
},
"capability": {
"level": "high",
"reasons": [
"reads sensitive or local data",
"has a read → egress path (a data-exfiltration surface)",
"can execute shell commands or code"
],
"tags": [
"sensitive-source",
"code-exec"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (35 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 (kernle/cli/commands/raw.py)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`kernle/cli/commands/raw.py:453`): 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": "kernle/cli/commands/raw.py"
},
"evidence": "subprocess subprocess.run([\"open\", str(raw_dir)], check=False) elif args.raw_action == \"sync\":",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "kernle/cli/commands/raw.py",
"line": 453,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (kernle/utils.py)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`kernle/utils.py:24`): 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": "kernle/utils.py"
},
"evidence": "try: result = subprocess.run( [\"git\", \"rev-parse\", \"--show-toplevel\"], capture_output=",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "kernle/utils.py",
"line": 24,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SUP-012",
"title": "Package has no license",
"category": "hygiene",
"severity": "info",
"confidence": "strong",
"description": "\"kernle\" has no declared license. This is a legal/reuse concern, not a security finding.",
"location": {
"kind": "package",
"name": "kernle"
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "memory_load",
"tags": [],
"reasons": {}
},
{
"tool": "memory_checkpoint_save",
"tags": [],
"reasons": {}
},
{
"tool": "memory_checkpoint_load",
"tags": [],
"reasons": {}
},
{
"tool": "memory_episode",
"tags": [],
"reasons": {}
},
{
"tool": "memory_note",
"tags": [],
"reasons": {}
},
{
"tool": "memory_search",
"tags": [],
"reasons": {}
},
{
"tool": "memory_value",
"tags": [],
"reasons": {}
},
{
"tool": "memory_goal",
"tags": [],
"reasons": {}
},
{
"tool": "memory_drive",
"tags": [],
"reasons": {}
},
{
"tool": "memory_when",
"tags": [],
"reasons": {}
},
{
"tool": "memory_consolidate",
"tags": [],
"reasons": {}
},
{
"tool": "memory_consolidate_advanced",
"tags": [],
"reasons": {}
},
{
"tool": "memory_status",
"tags": [],
"reasons": {}
},
{
"tool": "memory_raw",
"tags": [
"sensitive-source"
],
"reasons": {
"sensitive-source": [
"keyword \"dump\""
]
}
},
{
"tool": "memory_raw_search",
"tags": [],
"reasons": {}
},
{
"tool": "memory_auto_capture",
"tags": [],
"reasons": {}
},
{
"tool": "memory_belief_list",
"tags": [],
"reasons": {}
},
{
"tool": "memory_value_list",
"tags": [],
"reasons": {}
},
{
"tool": "memory_goal_list",
"tags": [],
"reasons": {}
},
{
"tool": "memory_drive_list",
"tags": [],
"reasons": {}
},
{
"tool": "memory_episode_update",
"tags": [],
"reasons": {}
},
{
"tool": "memory_goal_update",
"tags": [],
"reasons": {}
},
{
"tool": "memory_belief_update",
"tags": [],
"reasons": {}
},
{
"tool": "memory_sync",
"tags": [],
"reasons": {}
},
{
"tool": "memory_note_search",
"tags": [],
"reasons": {}
},
{
"tool": "suggestion_list",
"tags": [],
"reasons": {}
},
{
"tool": "suggestion_accept",
"tags": [],
"reasons": {}
},
{
"tool": "suggestion_dismiss",
"tags": [],
"reasons": {}
},
{
"tool": "suggestion_extract",
"tags": [],
"reasons": {}
},
{
"tool": "memory_process",
"tags": [],
"reasons": {}
},
{
"tool": "memory_process_status",
"tags": [],
"reasons": {}
},
{
"tool": "memory_process_exhaust",
"tags": [],
"reasons": {}
},
{
"tool": "memory_seed_repo",
"tags": [],
"reasons": {}
},
{
"tool": "memory_seed_docs",
"tags": [],
"reasons": {}
},
{
"tool": "memory_seed_status",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "51985c0c7b153120e0c3c18803404bf900adbea902bdcbfd2b77db4a197d5ffe",
"stats": {
"tools": 35,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 2,
"medium": 0,
"low": 0,
"info": 1
}
}
}