Most Common Crypto Exploit Techniques — 2025 vs 2026

Yesterday’s Kelp DAO $293M exploit pushes total losses to $3.95B across 159 incidents in 2025 and 2026 YTD, with the same root cause dominating: unauthorized key access.

Access control failures and private key compromises drove 62.8% of 2025 losses and 90.4% in 2026 YTD. Flash loans remain negligible at 0.1% and 0.7%. The threat landscape has shifted decisively from smart contract exploits to human and infrastructure layer failures.

👉🏻 defillama.com/hacks

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