As part of routine auditing and security review processes, an issue affecting the Zcash Orchard pool was identified over the weekend. Orchard-related transactions have been temporarily suspended. Privacy is unaffected. All funds are safe.
To protect Zcash users and the integrity of the network, developers, infrastructure operators, and other independent participants across the Zcash ecosystem have come together to coordinate a protocol update that requires a temporary suspension of Orchard pool activity during the upgrade rollout.
Orchard transactions are expected to be re-enabled at 14:00 EDT on June 2, 2026. We will provide a status update at 10:00 EDT.
Key Facts:
- The issue does not affect the privacy of any funds.
- The issue was identified through routine auditing before any known exploitation.
- The issue affects only Orchard, Zcash’s latest shielded pool.
- Only Orchard pool transactions will be suspended during the upgrade window. Wallet users will be unable to send or receive Orchard funds until the upgrade is complete.
- With the exception of the shielded Orchard pool, the Zcash network continues running. Transactions to and from the shielded Sapling and transparent pools are unaffected.
- ZEC held on exchanges is unaffected and can continue to be traded normally.
- This issue required a protocol-level change, which took effect at 22:30 EDT on June 1, 2026
This effort relies on voluntary cooperation among independent participants throughout the network. As part of our responsible disclosure, we are also notifying the maintainers of other protocols that have deployed Orchard.
Additional information will be shared when the upgrade is complete.