Zcash zcashd before 6.12.0 allows invalid transactions to be accepted under certain conditions, which potentially could have resulted in the draining of user funds from the Sprout pool. It was sometimes not verifying Sprout proofs.Referenceshttps://github.com/zcash/zcash/releases/tag/v6.12.0https://github.com/zcash/zcash/commit/db969c63f48f0f9fc518112ed0b7ace1af78b9d0
