Svg — the complete, unedited output of the deterministic mcptrustchecker engine v1.8.0, scanned . Every finding, capability tag and score component below is exactly what the engine produced — no AI, no post-processing.
{
"tool": {
"name": "mcptrustchecker",
"version": "1.8.0",
"methodologyVersion": "mcptrustchecker-1.8"
},
"target": {
"id": "svg-mcp",
"source": {
"kind": "package",
"origin": "svg-mcp"
},
"server": {
"name": "svg-mcp"
}
},
"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-1.8"
},
"capability": {
"level": "high",
"reasons": [
"can send data / act on an external service",
"can execute shell commands or code"
],
"tags": [
"external-sink",
"code-exec"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (30 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-001",
"title": "Dynamic code execution in server code (src/svg_mcp/_ext_apps_inline.js)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`src/svg_mcp/_ext_apps_inline.js:1`): 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/svg_mcp/_ext_apps_inline.js"
},
"evidence": "new Function(",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-001",
"file": "src/svg_mcp/_ext_apps_inline.js",
"line": 1
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (plugins/opencode/src/index.ts)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`plugins/opencode/src/index.ts:25`): 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": "plugins/opencode/src/index.ts"
},
"evidence": "child_process",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "plugins/opencode/src/index.ts",
"line": 25
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (plugins/opencode/src/sharedserver-resolve.ts)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`plugins/opencode/src/sharedserver-resolve.ts:12`): 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": "plugins/opencode/src/sharedserver-resolve.ts"
},
"evidence": "child_process",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "plugins/opencode/src/sharedserver-resolve.ts",
"line": 12
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (src/svg_mcp/render/export.py)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`src/svg_mcp/render/export.py:74`): 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/svg_mcp/render/export.py"
},
"evidence": "subprocess.run(",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "src/svg_mcp/render/export.py",
"line": 74
}
},
{
"ruleId": "MTC-SRC-002",
"title": "Shell/command execution in server code (src/svg_mcp/render/resvg.py)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`src/svg_mcp/render/resvg.py:66`): 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/svg_mcp/render/resvg.py"
},
"evidence": "subprocess.run(",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-002",
"file": "src/svg_mcp/render/resvg.py",
"line": 66
}
},
{
"ruleId": "MTC-SUP-012",
"title": "Package has no license",
"category": "hygiene",
"severity": "info",
"confidence": "strong",
"description": "\"svg-mcp\" has no declared license. This is a legal/reuse concern, not a security finding.",
"location": {
"kind": "package",
"name": "svg-mcp"
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "list_documents",
"tags": [],
"reasons": {}
},
{
"tool": "current_context",
"tags": [],
"reasons": {}
},
{
"tool": "export_svg",
"tags": [],
"reasons": {}
},
{
"tool": "outline",
"tags": [],
"reasons": {}
},
{
"tool": "get_bbox",
"tags": [],
"reasons": {}
},
{
"tool": "list_layers",
"tags": [],
"reasons": {}
},
{
"tool": "describe_document",
"tags": [],
"reasons": {}
},
{
"tool": "get_computed_style",
"tags": [],
"reasons": {}
},
{
"tool": "get_transform",
"tags": [],
"reasons": {}
},
{
"tool": "get_geometry",
"tags": [],
"reasons": {}
},
{
"tool": "get_params",
"tags": [],
"reasons": {}
},
{
"tool": "convert_units",
"tags": [],
"reasons": {}
},
{
"tool": "describe_node",
"tags": [],
"reasons": {}
},
{
"tool": "list_resources",
"tags": [],
"reasons": {}
},
{
"tool": "list_fonts",
"tags": [],
"reasons": {}
},
{
"tool": "path_bbox",
"tags": [],
"reasons": {}
},
{
"tool": "get_filter",
"tags": [],
"reasons": {}
},
{
"tool": "find",
"tags": [],
"reasons": {}
},
{
"tool": "get_subtree",
"tags": [],
"reasons": {}
},
{
"tool": "extract_image",
"tags": [],
"reasons": {}
},
{
"tool": "list_guides",
"tags": [],
"reasons": {}
},
{
"tool": "list_pages",
"tags": [],
"reasons": {}
},
{
"tool": "render_document",
"tags": [],
"reasons": {}
},
{
"tool": "render_svg",
"tags": [],
"reasons": {}
},
{
"tool": "render_backends",
"tags": [],
"reasons": {}
},
{
"tool": "export_render",
"tags": [],
"reasons": {}
},
{
"tool": "export_formats",
"tags": [],
"reasons": {}
},
{
"tool": "measure_text",
"tags": [],
"reasons": {}
},
{
"tool": "start_preview",
"tags": [],
"reasons": {}
},
{
"tool": "set_preview_backdrop",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"open_pr\""
]
}
}
],
"surfaceDigest": "35453c3bdd12a892061be733faedb8bf891e76f1d565b7120b0cc3e98601f33e",
"stats": {
"tools": 30,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 5,
"medium": 0,
"low": 0,
"info": 1
}
}
}