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Posted on • Originally published at beyondmachines.net

Zcash Patches Critical Orchard Circuit Flaw via Emergency Upgrade

Summary

Zcash developers patched a critical logic flaw in the Orchard shielded pool's zero-knowledge circuit that could have allowed unauthorized value creation. The fix was deployed via an emergency network upgrade (NU6.2). There is no evidence of exploitation or privacy loss.

Take Action:

If you run a Zcash node or wallet/exchange infrastructure, update to Zebra 5.0.0 (or the latest Zcashd) to stay on the correct chain that includes the NU6.2 fix for the Orchard circuit flaw. Until you've upgraded, treat any Orchard pool balances or transactions as unreliable, and don't act on block explorer or wallet data that may still be out of sync.


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This article was originally published on BeyondMachines

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