Shielded Labs proposed a new Zcash network upgrade that would let anyone verify the privacy coin's supply has not been secretly inflated, after disclosing that a recently patched bug in the network's main shielded pool could have allowed undetectable counterfeiting of ZEC.

A Zcash vulnerability could have allowed double-spending within the network's flagship privacy pool, though no exploitation occurred.

Zcash said developers temporarily suspended Orchard transactions to patch a critical bug, after explorer data sparked outage claims.