Zebra 6.3.0 Release
Zebra 6.3.0: Sync and Peer-Scoring Security Fixes and New Node Reporting Today we are releasing Zebra 6.3.0 as a recommended security release. It resolves four security advisories in block synchronization and peer scoring, including a peer-induced delay in tip discovery, a near-tip sync stall, and gaps that let malicious peers get honest peers banned or […]
Zebra 6.2.3 Release
Zebra 6.2.3: Peer Connectivity Hardening This is an optional release with a set of peer connectivity improvements. It is targeted at operators who see issues with their node’s peer set. Improvements Outbound Slots No Longer Fill With Non-Serving Peers During Sync Outbound peer slots could previously fill up with peers that advertise no services, which […]
Zebra 6.2.1 Release
Zebra 6.2.1: Security Hardening and a Testnet Template Fix We are pleased to announce the release of Zebra 6.2.1. This patch release adds two security hardening improvements to chain synchronization and mempool verification, and fixes a Testnet-only block-template timing issue. All node operators are encouraged to upgrade. Security Advisories GHSA-x93j-mj2f-q338: Poisoned Blocks Can Delay Download […]
Zebra 6.1.0 Release
Zebra 6.1.0: New getstandardfee RPC and Four Security Fixes We are releasing Zebra 6.1.0 today. This release adds a new getstandardfee RPC and fixes four security issues affecting block verification, node liveness, and mining. There are no consensus changes. All node operators are encouraged to upgrade. New Features getstandardfee RPC A new getstandardfee RPC returns […]
Zebra, Zakura, and the road through NU6.3
Yesterday, Valar Group and Project Tachyon announced Zakura, a new Zcash full node built from the Zebra codebase. We want to state plainly: this is good for Zcash, and we welcome it. Zebra was built to be forked. We released it under permissive open-source licenses precisely so that anyone could build on it and improve […]
Zebra 6.0.0 Release
Zebra 6.0.0: NU6.3 “Ironwood” Mainnet Activation We are releasing Zebra 6.0.0 today. This is the first stable release with support for the NU6.3 “Ironwood” network upgrade on Mainnet, setting the Ironwood activation height at 3,428,143. It promotes the work first shipped in 6.0.0-rc.0 to a stable release, and adds a mempool-verification security fix, several networking […]
Zebra 6.0.0-rc.0 Release
Zebra 6.0.0-rc.0: NU6.3 “Ironwood” Support and Security Fixes We are pleased to announce the release of Zebra 6.0.0-rc.0. This release candidate adds Testnet support for the NU6.3 “Ironwood” shielded pool and v6 transaction format, fixes two moderate-severity security issues, ships signed pre-built zebrad binaries for Linux, and includes a state database format upgrade. All node […]
Zebra 5.2.0: Wider Rollback Window
We have recently released Zebra 5.2.0. This release ships a robustness improvement that was merged to main after the 5.1.1 maintenance release: a significantly wider local rollback window to defend against consensus splits. All node operators are encouraged to upgrade. Nodes running Zebra 5.1.1 or earlier will reach end-of-support on approximately July 25, 2026, ahead […]
Zebra 5.1.0 Release
Zebra 5.1.0: Sync Stall Fix and Extended Peer Diagnostics We are releasing Zebra 5.1.0 today. This release resolves a long-standing genesis-to-tip sync stall that could leave nodes stuck mid-sync, raises the minimum network protocol version to NU6.2, and extends the getpeerinfo RPC with additional peer metadata. All node operators are encouraged to upgrade. Breaking Changes […]
Zebra 4.5.3 and 5.0.0: Emergency Soft Fork and NU6.2 Activation
We have recently released Zebra 4.5.3 and Zebra 5.0.0. These two releases work together to address a critical bug in the Orchard Action circuit: 4.5.3 implemented an emergency soft fork that temporarily disabled Orchard actions while the fix was being prepared, and 5.0.0 activated NU6.2, which re-enables Orchard using the corrected circuit. We strongly urge […]