Topic starter
30/09/2026 5:00 pm
TL;DR: EchoLeak lets Microsoft 365 Copilot leak context with no click, and Reco AI ties that failure to agent runtime access that goes beyond the prompt. The agent session needs tighter scope, isolation, and authority so untrusted messages cannot reach sensitive context.
Editorial analysis by NHI Mgmt Group, based on content published by Reco AI: “OWASP Top 10 for LLM Applications: What Every Security Team Needs to Know”.
Key questions
Q: Why do zero-click defenses fail for AI agent context exposure?
A: Because zero-click defenses were built around user interaction, not autonomous or agent-mediated interpretation.
Q: How do security teams know if an AI agent has too much access?
A: Look for agents that can reach multiple systems without task-specific limits, use persistent tokens, or touch high-value services such as email, chat, cloud consoles, and file stores.
Q: What breaks when AI agents can process untrusted messages inside a privileged runtime?
A: The trust boundary breaks first.
Practitioner guidance
- Inventory agent runtime context Map every data source, connector, memory store, and downstream tool that Copilot or other AI agents can reach during a session.
- Separate untrusted input from privileged context Keep user-supplied content, external messages, and retrieved content out of the same trust zone as the agent’s operational permissions.
- Treat delegated agent access as live authority Review whether the agent inherits access that outlives the task, and remove any broad session-wide permissions that are not required for a narrowly defined outcome.
Bottom line: EchoLeak shows that AI agent exposure is a runtime-boundary problem, not just a prompt-safety problem.
Glossary terms: Runtime exposure management, Context Window, Prompt Injection (Agentic), Delegated Access
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This topic was modified 3 days ago by NHI Mgmt Group
30/09/2026 5:00 pm
AI agent context is the security boundary, not the prompt. EchoLeak shows that the dangerous asset is the runtime context holding tools, memory, and delegated access. Prompt controls help only at the edge; they do not govern what the agent can already see or use. The practitioner conclusion is that agent governance must start with a complete inventory of context-bearing privileges.
A few things that frame the scale:
- AI-related credential leaks surged 81.5% year-over-year in 2025, with the surrounding AI infrastructure leaking 5x faster than core LLM providers, according to the State of Secrets Sprawl 2026.
A question worth separating out:
Q: What should teams do first after finding exposed AI agent context risk?
A: Start by removing unnecessary connectors, memory access, and broad session permissions from the agent. Then isolate the remaining trusted context from untrusted input so a crafted message cannot reach the same authority plane as sensitive data. That sequence reduces the attack surface before more advanced controls are added.
👉 Read our full editorial: EchoLeak reveals how AI agent context exposure breaks zero-click defenses