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…

Over the past two weeks, we worked on reducing delays for miners, improving Zebra’s handling of competing blocks, and supporting lower transaction fees. We also restored documentation updates,…

The ZCAP poll on the outstanding scope questions for NU7 has closed, having run since August 27th concurrently with the coinholder poll. This poll followed the NU7 Sentiment Polling from earlier this…

Today, we opened a SIV poll of the Zcash Community Advisory Panel (ZCAP), which will run until Monday, September 14th, 19:00 UTC, concurrently with the coinholder poll. The purpose of this poll is to…

Over the last two weeks we focused on making Zebra sync reliably all the way to the chain tip, which had been a recurring problem since the NU6.3 upgrade. We also replaced Mergify with GitHub’s…

Today, we opened a SIV poll of the Zcash Community Advisory Panel (ZCAP), which will run until Monday, September 14th, 19:00 UTC, concurrently with the coinholder poll. The purpose of this poll is to…

The big event of the last two weeks was NU6.3 “Ironwood” going live on Zcash Mainnet. A lot of our work focused on keeping nodes healthy through activation: making sure the zcashd-compat sidecar kept…

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,…

The Zcash Arborist Calls are bi-weekly protocol development meetings focused on tracking upcoming protocol deployment logistics, consensus node implementation issues, and protocol research.

The Zcash Foundation is committed to transparency and openness with the Zcash community and our other stakeholders. Today, we are releasing our Q2 2026 report, which provides an overview of the work…

First, some news from just after this update’s window: the NU6.3 (Ironwood) network upgrade activated on Mainnet on 28th July — we’ll cover it properly in the next update. Over the last two weeks we…

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…

The Zcash Arborist Calls are bi-weekly protocol development meetings focused on tracking upcoming protocol deployment logistics, consensus node implementation issues, and protocol…

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…

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…

The headline this period is Zebra v6.0.0, which adds full support for NU6.3 “Ironwood” — the next Zcash network upgrade, bringing a new shielded pool and transaction format — and sets its Mainnet…

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…

Over the last two weeks most of our attention went into making Zebra’s releases easier to trust and install: a new reviewed release process, downloadable signed binaries, and signed Docker images…

The ZCAP poll to elect two members of the Zcash Community Grants committee closed on Monday, June 29th, and the results are in: GGuy and Paul Brigner are therefore elected to the committee, joining…

Get tickets online for Zcon7: Cancún here.

Are you interested in serving on ZCG? Now is your chance! Two committee members’ will reach the end of their terms at the end of June: @decentralistdan and @GGuy. Anyone can stand for election,…

The Zcash Arborist Calls are bi-weekly protocol development meetings focused on tracking upcoming protocol deployment logistics, consensus node implementation issues, and protocol…

Are you interested in serving on ZCG? Now is your chance! Two committee members’ will reach the end of their terms at the end of June: @decentralistdan and @GGuy. Anyone can stand for election,…

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…

Arborist Calls View Recordings The Zcash Arborist Calls are bi-weekly protocol development meetings focused on tracking upcoming protocol deployment logistics, consensus node implementation issues,…

This was a busy two weeks. A soundness bug in the Orchard circuit was discovered and resolved through a coordinated network upgrade. Alongside that, we landed a fix for a sync stall affecting initial…

Get tickets online for Zcon7: Cancún here.

The Zcash Arborist Calls are bi-weekly protocol development meetings focused on tracking upcoming protocol deployment logistics, consensus node implementation issues, and protocol research.

Today, we opened a SIV poll of the Zcash Community Advisory Panel (ZCAP), which will run until Monday, June 29th, 20:00 UTC. The purpose of this poll is to fill two seats on the Zcash Community…