ShadowLeak: The First Service-Side Leaking, Zero-click Indirect Prompt Injection Vulnerability

Precautionary Advisory: ShadowLeak Vulnerability in AI Assistant

Radware has disclosed a critical zero-click vulnerability called ShadowLeak, affecting AI assistants like ChatGPT when connected to enterprise systems (e.g., Gmail, web browsing). This exploit enables attackers to exfiltrate (extract) sensitive data – such as (Personally Identifiable Information (PII), Protected Health Information (PHI), legal strategy, or credentials – without any user interaction Recommendations:

  1. AI Agents should not be a passive tools – proper due diligence such as Data Processing Impact Assessment (DPIA) should be done prior to engaging AI agents for tasks automation
  2. Data Processing Agreement (DPA) (aka Vendor Due Diligence) to include a new section of Prompt-Injection Resilience Testing
  3. All inbound HTML should be flatten to Plain Text where feasible before submitting to Large Language Model (LLM) – AI agent processing