Semahash — 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": "semahash",
"source": {
"kind": "package",
"origin": "semahash"
},
"server": {
"name": "semahash"
}
},
"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 (13 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 (src/sema/server/static/assets/GraphPage-2VgYBBGA.js)",
"category": "injection",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`src/sema/server/static/assets/GraphPage-2VgYBBGA.js:4056`): 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": "src/sema/server/static/assets/GraphPage-2VgYBBGA.js"
},
"evidence": "){let o=t(s,a),{Body:l}=new Function(o)();return l}function t(s,a){return` ${r(s,a)} ${n(s)} return {Body: Body, Vector:",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-010",
"file": "src/sema/server/static/assets/GraphPage-2VgYBBGA.js",
"line": 4056,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-001",
"title": "Dynamic code execution in server code (src/sema/server/static/assets/GraphPage-2VgYBBGA.js)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`src/sema/server/static/assets/GraphPage-2VgYBBGA.js:4056`): 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": "src/sema/server/static/assets/GraphPage-2VgYBBGA.js"
},
"evidence": "){let o=t(s,a),{Body:l}=new Function(o)();return l}function t(s,a){return` ${r(s,a)} ${n(s)} return {Body: Body, Vector:",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-001",
"file": "src/sema/server/static/assets/GraphPage-2VgYBBGA.js",
"line": 4056,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (src/sema/audit/runner.py)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`src/sema/audit/runner.py:33`): 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/sema/audit/runner.py"
},
"evidence": "axonomy.db\") proc = subprocess.run( [sys.executable, \"-m\", module], capture_output=True, tex",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "src/sema/audit/runner.py",
"line": 33,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-005",
"title": "Dynamic module load from a non-literal (src/sema/server/static/assets/chunk-QFMPRPBF-DgVX359w.js)",
"category": "permissions",
"severity": "medium",
"confidence": "heuristic",
"description": "In the server's implementation (`src/sema/server/static/assets/chunk-QFMPRPBF-DgVX359w.js:5`): Loading a module chosen at runtime (from a variable) can pull in and run attacker-influenced code paths. 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/sema/server/static/assets/chunk-QFMPRPBF-DgVX359w.js"
},
"evidence": "t[e.id];try{let r=await import(e.module);return t[e.id]=r,r}catch(r){return console.error(`Error loading route module \\`",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-005",
"file": "src/sema/server/static/assets/chunk-QFMPRPBF-DgVX359w.js",
"line": 5,
"nonRuntime": false
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in packaging/dev tooling (src/sema/core/tests/test_libraries.py)",
"category": "permissions",
"severity": "low",
"confidence": "heuristic",
"description": "In a packaging/dev/install script (shipped, but not the server runtime) (`src/sema/core/tests/test_libraries.py:280`): 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/sema/core/tests/test_libraries.py"
},
"evidence": "r, second_dir): subprocess.run( [ sys.executable, str(script),",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "src/sema/core/tests/test_libraries.py",
"line": 280,
"nonRuntime": true
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in packaging/dev tooling (src/sema/mcp/tests/test_mcp_pull.py)",
"category": "permissions",
"severity": "low",
"confidence": "heuristic",
"description": "In a packaging/dev/install script (shipped, but not the server runtime) (`src/sema/mcp/tests/test_mcp_pull.py:40`): 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/sema/mcp/tests/test_mcp_pull.py"
},
"evidence": "ols)))\" ) out = subprocess.check_output([sys.executable, \"-c\", code], env=env, text=True) return set(out.str",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "src/sema/mcp/tests/test_mcp_pull.py",
"line": 40,
"nonRuntime": true
}
},
{
"ruleId": "MTC-SUP-012",
"title": "Package has no license",
"category": "hygiene",
"severity": "info",
"confidence": "strong",
"description": "\"semahash\" has no declared license. This is a legal/reuse concern, not a security finding.",
"location": {
"kind": "package",
"name": "semahash"
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "sema_reset_session",
"tags": [],
"reasons": {}
},
{
"tool": "sema_search",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "sema_resolve",
"tags": [],
"reasons": {}
},
{
"tool": "sema_tree",
"tags": [],
"reasons": {}
},
{
"tool": "sema_lookup",
"tags": [],
"reasons": {}
},
{
"tool": "sema_validate",
"tags": [],
"reasons": {}
},
{
"tool": "sema_stats",
"tags": [],
"reasons": {}
},
{
"tool": "sema_graph_skeleton",
"tags": [],
"reasons": {}
},
{
"tool": "sema_use",
"tags": [],
"reasons": {}
},
{
"tool": "sema_root",
"tags": [],
"reasons": {}
},
{
"tool": "sema_handshake",
"tags": [],
"reasons": {}
},
{
"tool": "sema_propose_context",
"tags": [],
"reasons": {}
},
{
"tool": "sema_verify_context",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "f7dfbe8fc231b3948965b6da8782e388aa4ca400d63d05ab91d9f9b24e667c53",
"stats": {
"tools": 13,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 3,
"medium": 1,
"low": 2,
"info": 1
}
}
}