Microsoft 365 Copilot Flaw Allows AI Assistant to Summarize Sensitive Emails

A security flaw in Microsoft 365 Copilot is causing the AI assistant to incorrectly summarize email messages protected by confidentiality sensitivity labels, bypassing configured Data Loss Prevention (DLP) policies dxposing potentially sensitive organizational data to unauthorized AI processing. The issue, tracked under Microsoft reference CW1226324, was first flagged on February 4, 2026, and remains ongoing. […]

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