Data Exfiltration Patterns Across Boundaries - Anthale

This reference covers leak attempts that keep changing wording but follow the same underlying pattern.

Common exfiltration patterns

Pattern	What it looks like	Companion controls
Direct extraction	The prompt asks for a secret, record, or hidden instruction in one step	Prompt injection protection and business-side authorization
Staged extraction	The attacker requests the data piece by piece across several turns	Prompt injection protection and logging that preserves conversation context
Tool-assisted retrieval	The model is pushed toward broad searches, database access, or connector use	Business authorization, prompt injection protection, and output checks
Link-based exfiltration	Sensitive content is placed into a URL, redirect, or outbound payload	Link control and output-path data leakage prevention
Debug or audit pretext	The request is framed as troubleshooting, export, compliance, or validation work	Policy review of privileged tasks and stronger prompt injection controls
Reflection or echo leakage	The model is asked to repeat earlier context, hidden instructions, or prior messages	Input and output leakage checks, plus prompt injection protection

Why prompt injection often comes first

Many serious leaks start with authority manipulation. The attacker first tries to weaken or bypass system instructions, then asks for sensitive material, and finally tries to move it somewhere useful. That is why Prompt Injection Protection, Data Leakage Prevention, and Link Control so often appear together in production policy bundles.

Next steps

From here, go to Link Control or return to Data Leakage Prevention.

Last modified on March 19, 2026