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Microsandbox MCP — agentic threat model

5.7AIVSS 5.7 · Medium

Microsandbox MCP acts as a secure execution layer for untrusted AI-generated code, reducing host-level risks but presenting a high-impact target if its isolation boundaries are breached during arbitrary code execution.

OWASP AIVSS score rationale

AIVSS = (CVSS_Base + AARS) × Mitigation_Factor, where AARS = (10 − CVSS_Base) × (Factor_Sum / 10) × ThM
CVSS base 8.5AARS uplift 0.93Factor sum 5.9/10Threat ×1.05Mitigation ×0.6
Autonomy of Action
0.80
Goal-Driven Planning
0.70
Self-Modification
0.30
Dynamic Tool Use
0.90
Persistent Memory
0.20
Contextual Awareness
0.60
Dynamic Identity
0.40
Multi-Agent Interactions
0.50
Non-Determinism
0.80
Opacity & Reflexivity
0.70

Scored with the canonical OWASP AIVSS formula (AIVSS calculator reference); agentic risk factors estimated from the agent’s described capabilities.

MAESTRO 7-layer threat model

Per-layer threats for this agent. Layers tagged “not certain from listing” are general, caveated commentary where the public description didn’t pin that layer.

L1 · Foundation Models⚠ not certain from listing

Not certain from the listing — The platform is model-agnostic and acts as an execution target for external LLMs; threats include adversarial code generation designed to exploit the sandbox runtime.

L2 · Data Operations⚠ not certain from listing

Not certain from the listing — The agent handles data analysis workloads, but specific data storage, vector databases, or RAG pipeline integrations are not detailed in the directory listing.

L3 · Agent Frameworks✓ mapped

The platform exposes Model Context Protocol (MCP) tools to orchestrate code execution and browser-use workloads, making it vulnerable to tool misuse and prompt injection that triggers malicious code generation.

L4 · Deployment & Infrastructure✓ mapped

This is the core focus of the agent. It provides a self-hosted sandbox to isolate untrusted code execution and browser-use from the host, mitigating container escape, host compromise, and lateral movement risks.

L5 · Evaluation & Observability⚠ not certain from listing

Not certain from the listing — The directory listing does not specify what logging, execution auditing, or runtime guardrails are active inside or outside the sandbox environment.

L6 · Security & Compliance (cross-cutting)✓ mapped

The agent is designed as a security control (sandboxing) to reduce code-execution risk, but the listing does not detail authentication, authorization policies, or compliance certifications.

L7 · Agent Ecosystem✓ mapped

Supports browser-use and MCP tool integration, exposing the sandbox to external web environments and potential multi-agent orchestration vulnerabilities if untrusted agents interact with the runtime.

MAESTRO — the 7-layer agentic threat-modeling framework (Cloud Security Alliance / Ken Huang).