AI agent security: how to protect your automation from prompt injection and data leaks
The security challenge
When you deploy AI agents that can execute code, call APIs, and access databases, you're giving them enormous power. That power comes with risk:
- Prompt injection — Malicious input that tricks agents into doing things they shouldn't
- Data exfiltration — Agents accidentally leaking sensitive information
- Privilege escalation — One compromised agent accessing another agent's resources
- Supply chain attacks — Compromised third-party APIs or models
How Helix approaches agent security
The Kavach Agent
Kavach is our dedicated security agent. It doesn't just monitor — it actively enforces security policies across all 24 agents.
Key Security Measures
1. Tenant Isolation
Each user's data is strictly isolated. Agent A for User 1 cannot access User 2's data, even if they're running on the same server. This is enforced at the database level, not just the application level.
2. Input Validation
All input is validated server-side. Never trust client data, even from authenticated users. This applies to agent commands, API calls, and webhook payloads.
3. Scope-Limited API Keys
When agents call external APIs, they use scoped keys with minimal permissions. If an agent only needs to read data, it doesn't get write access.
4. Audit Logging
Every agent action is logged with timestamps, user context, and data access patterns. This creates a complete audit trail for security review.
5. Rate Limiting
Per-user and per-agent rate limits prevent abuse. If an agent suddenly starts making 10x its normal API calls, it gets throttled automatically.
Common mistakes to avoid
- Don't store secrets in prompts — Prompts can be logged, cached, or leaked
- Don't give agents admin access — Principle of least privilege applies to AI too
- Don't skip input validation — Even "internal" data from other agents should be validated
- Don't ignore error messages — Stack traces and error details can leak sensitive information
Secure your automation. Try Helix free → Enterprise tier includes full audit logging and advanced security features.