
An AI-Assisted Audit Found a Four-Year-Old Flaw in Zcash That Could Have Enabled Unlimited Double-Spending
A security researcher using Anthropic's Claude Opus 4.8 uncovered a critical soundness bug in Zcash's Orchard shielded pool that had gone undetected since May 2022, allowing the same shielded ZEC to be spent more than once. An emergency hard fork patched the circuit before any exploit was confirmed.










