Zcash Drops 60% After Orchard Counterfeiting Flaw Found With Claude Opus 4.8

Zcash (ZEC) fell about 60% after a critical flaw was disclosed that could have enabled unlimited counterfeit coins. The issue was present in the Orchard pool since May 2022 and was identified on May 29 during a targeted review using Anthropic's Claude Opus 4.8 model. Zcash contributors pushed an emergency hard fork patch between June 1 and June 3 while developers discuss longer-term supply verification changes.