Analysis
What Is Cross-Modal Prompt Injection? Definition & Examples
Publication date unknown · Discovered nhimg.org
Page published
Publication date unknown · First observed: 5 Nov 2026
Coverage timeline
Single-source analysis — one report is available.
Why it matters
Cross-modal prompt injection makes multimodal ingestion pipelines part of the agent security boundary, requiring defenders to prevent untrusted content from authorizing tool actions or accessing privileged context.
NHI Mgmt Group's glossary entry explains cross-modal prompt injection, where instructions embedded in images, audio, video, or other content can redirect an AI agent or expose sensitive context. The entry outlines trust boundaries, content isolation, and tool-use policy checks as defenses, without presenting a new exploit or observed incident.