On May 29th, using Opus 4.8, security researcher Taylor Hornby found a critical vulnerability in Orchard, Zcash's newest and largest shielded pool, while researching the protocol for Shielded Labs, an independent Zcash support organization. He disclosed it privately to Zcash Open Development Lab (ZODL), one of the protocol's core teams, which confirmed it within hours and started coordinating a response.