Automate Security Incident Triage with GPT-4o-mini and Gmail Notifications

What this workflow does

Automatically triages inbound security findings (e.g., from AWS Security Hub via EventBridge → SNS → Webhook), classifies them with an LLM, generates a 3-step remediation plan, and emails a compact incident brief.

Pipeline: Webhook → Clean_Finding (normalize) → Classify (LLM) → Plan (LLM) → Gmail (email). You can substitute Microsoft Teams, Slack, etc.

• Normalizes the incoming finding JSON (title, description, account, resource id/type, updated_at).

• Uses an LLM to assign incident_type, severity (P0--P3), urgency, short_title, and why (concise rationale).

• Produces a 3-step remediation plan with owner_hint and success_criteria---kept atomic and practical.

• Sends a clean HTML email with all details (subject line includes short title, resource, and account).

Category: Security / Cloud / Incident Management
Time to set up: ~10--15 minutes
Difficulty: Beginner--Intermediate
Cost: Mostly free (n8n CE; OpenAI usage + Gmail/SMTP as used)

What you'll need

• An n8n instance reachable over HTTP (for the Webhook node).

• OpenAI (or compatible) credentials set in n8n.

• Gmail OAuth2 credentials (or swap Gmail node for SMTP).

• A source that can POST a Security-Hub-style finding to your webhook (EventBridge/SNS, a SIEM, or curl).

Output (Email)

• Subject: <short_title> - <resource_id> in <account_id>

• Body: HTML summary with Type, Account, Urgency, Why, Next Actions (3 steps), Owner, Success criteria.