Data leakage

DEFINITION

Risk class 2 of the Risk Taxonomy 2026: information that should have remained inside the function reaches a model provider, a vendor's broader infrastructure, or another vendor customer through the AI system's data pathways — whether through training-use terms, logging, data residency gaps, or vendor support access to prompt content. Addressed by contemporaneous proof of data isolation, residency, retention bounds, and vendor-access controls per AI system in use.

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