Zcash: Orchard flaw disclosed June 5 could have enabled undetectable counterfeit ZEC

Zcash developers and Shielded Labs said a critical bug in the Orchard shielded pool could have allowed attackers to mint unlimited counterfeit ZEC without detection, though they reported no evidence of real-world exploitation. The issue was present from Orchard's May 2022 activation until an emergency remediation deployed on June 2, and the team said Orchard's privacy design prevents a definitive cryptographic confirmation of whether it was used.