Agent Mosaic: Confidentiality Leaks in Agentic LLM Systems

# Agent Mosaic: Confidentiality Leaks in Agentic LLM Systems

https://gcdradar.vercel.app/incidents/agent-mosaic-confidentiality-leaks-in-agentic-llm-systems · AIR-2026-1477 · closed 2026-11-06

- Lane: Research
- Severity: 1 (Research / proof of concept)
- Fix status: Fix status unknown
- First reported: 2026-10-23
- AI role: Attack on AI
- Products: GPT-5.6-Sol

## Summary

Researchers demonstrated that LLM agents can assemble and disclose sensitive conclusions from multiple accessible documents through a mosaic effect. The study highlights privacy and confidentiality risks in agentic workflows over sensitive data.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-10-23: Agent Mosaic: Recognizing Confidentiality Leaks in Agentic LLM Systems (https://arxiv.org/abs/2610.30418)

## Sources

- 2026-10-23 arXiv: Agent Mosaic: Recognizing Confidentiality Leaks in Agentic LLM Systems https://arxiv.org/abs/2610.30418

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.