Microsoft Copilot Leak Reveals Secret System Prompt Inputs That Allowed Security Bypass

Security researchers have demonstrated a flaw in Microsoft Copilot where carefully constructed input sequences forced the AI model to output its complete system prompt, including confidential internal safety boundaries and hidden override tokens.

Prompt Leakage Breakdown: How Specialized Inputs Triggered System Instruction Dumps

The leak revealed secret debugging instructions designed for internal testing that could be abused by malicious actors to bypass enterprise data boundary controls and extract cached user emails.

Enterprise Data Exfiltration Risks in Office 365 Copilot Integration

Microsoft has deployed emergency cloud patches to sanitize prompt outputs and restrict access to privileged debugging flags within enterprise Copilot tenants.