IBM Cost of a Data Breach Report 2026

The IBM Cost of a Data Breach Report 2026 is here, and it confirms what security leaders have feared: frontier AI has tipped the balance firmly in favour of attackers.

This year's findings mark a turning point. After a brief dip in 2025, the global average cost of a data breach has climbed to a record USD 4.99 million, driven largely by AI-powered attacks that move at machine speed while most organisations are still defending at human speed.

Key takeaways from this year's report:

• AI attacks are surging. Malicious AI-driven attacks rose 56% year on year, adding an average of USD 1 million to the cost of every breach they touched.
• Access controls haven't kept pace. Among organisations that suffered an AI-related breach, 92% lacked proper AI access controls, turning basic enforcement gaps into major financial exposure.
• Shadow AI risk has doubled. Security incidents involving unapproved AI tools more than doubled to 43% this year, often leading to data loss, disrupted operations and regulatory fines.
• Non-human identities remain unsecured. Fewer than half of organisations (46%) are securing the non-human identities that power their AI workflows, leaving a critical blind spot as AI agents scale.
• Spending is following the threat. 85% of breached organisations now plan to increase security spending specifically in response to frontier AI model threats, up sharply from 64% before they understood the scale of the risk.

The message is unambiguous: organisations that use AI and automation extensively in their own security operations save an average of USD 1.93 million per breach and identify incidents 65 days faster than those that don't. The gap between AI-enabled defenders and everyone else is widening fast.

Download the IBM Cost of a Data Breach Report 2026 for full analysis of AI-driven attack trends, the true cost of ungoverned AI, and practical recommendations for closing the gap between adoption and oversight.