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Security audit

n8n-workflow-automation

Security checks for vulnerabilities and agentic risk

Overview

This skill is a read-only n8n workflow design helper with disclosed safety boundaries and no executable install or persistence behavior.

Before installing, remember that generated n8n workflows may connect to business systems such as email, drives, sheets, or databases after you import and configure them in n8n. Review generated workflow JSON, keep credentials in n8n/env vars, and leave workflows inactive until you have checked scopes, logging, retries, and approval steps.

A.I.G

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (2)

Hidden Instructions

High
Category
Prompt Injection
Confidence
60% confidence
Finding

Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 1)May include surrounding context.

md
---
name: n8n-workflow-automation
version: 1.0.0
description: "Design and output n8n workflow JSON with robust triggers, idempotency, error handling, and human-..."

Instruction Override

High
Category
Prompt Injection
Confidence
90% confidence
Finding

This pattern attempts to override system instructions or ignore safety constraints. Without LLM analysis, manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 24)May include surrounding context.

md
- Make this n8n flow idempotent so it does not duplicate records when it reruns.
  - Instrument this workflow with audit logs and a human approval step.
- DO NOT USE WHEN�?  - You need code-only automation without n8n (use a scripting/CI skill).
  - You need to bypass security controls or hide audit trails.
  - You need to purchase or recommend prohibited items/services.

## INPUTS

Static analysis

No suspicious patterns detected.