Zebra 7.0.0-rc.0: NU7 Arrives on Testnet
We are pleased to announce the release of Zebra 7.0.0-rc.0, the first release candidate for NU7, the next Zcash network upgrade. NU7 brings blocks every 25 seconds instead of every 75, a new Network Sustainability Mechanism that recycles part of every transaction fee into future block rewards, and new shielded limits that protect wallets from […]
Zebra 6.4.2 Release
Zebra 6.4.2: Emergency Fix for a Remotely Triggerable Crash Zebra 6.4.2 is an emergency security release that fixes a high-severity vulnerability in Zebra 6.4.0 and 6.4.1 that lets any peer crash a node with a single network message. Both of those versions are recalled, and all operators running either one should upgrade to 6.4.2 immediately. […]
Zebra 6.4.0 and 6.4.1: Security Fixes, Light Client Serving, and NU7 Preparation
Zebra 6.4.0 is a security release that also adds an experimental lightwalletd-compatible gRPC server, lowers the ZIP 317 conventional fee, speeds up block template delivery for miners, and moves the end-of-support halt earlier in preparation for NU7, which is tentatively scheduled for November 5, 2026. Zebra 6.4.1, released the same day, fixes a potential sync […]
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 […]