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 […]
Zebra 4.5.1: Security Fixes
We are releasing Zebra 4.5.1 today. This release contains a fix for a consensus-critical security vulnerability, and we strongly encourage all node operators to upgrade immediately. Note that 4.5.0 was released yesterday, so if you have just updated, unfortunately you will need to update again. Security Advisories GHSA-2prc-cj5x-4443: P2SH Sigop Undercount Not Correctly Fixed (Critical) […]
Zebra 4.5.0 Release
Zebra 4.5.0: Security Fixes We are releasing Zebra 4.5.0 today. This release contains fixes for multiple security vulnerabilities, including one consensus-critical issue, and we strongly encourage all node operators to upgrade immediately. The release also adds support for mining to a shielded address. Security Advisories GHSA-gf9r-m956-97qx: P2SH Sigop Undercount in Pure-Rust Script Parser (Critical) Zebra’s […]
Zcash Foundation Q1 2026 Report
The Zcash Foundation is committed to transparency and openness with the Zcash community and our other stakeholders. Today, we are releasing our Q1 2026 report, which provides an overview of the work undertaken by our engineering team, as well as an overview of other activities during this period. As with our previous quarterly reports, this […]
Zebra 4.4.1: Critical Security Fix
We are releasing Zebra 4.4.1 today. This release contains a fix for a consensus-critical security vulnerability, and we strongly encourage all node operators to upgrade immediately. You can update directly to it if you have not updated for the last couple of releases. Note that the 4.4.0 release was just three days ago. If you […]
Zebra 4.4.0: Critical Security Fixes
We are releasing Zebra 4.4.0 today. This release contains fixes for multiple security vulnerabilities, including several consensus-critical issues, and we strongly encourage all node operators to upgrade immediately. Security Advisories GHSA-28xj-328h-72vm: Permanent Block Discovery Halt via Gossip Queue Saturation + Syncer Poisoning Zebra’s block discovery pipeline contained a composite denial-of-service vulnerability that allowed a remote […]
Zebra 4.3.1: Critical Security Fixes, Dockerized Mining and CI Hardening
We are releasing Zebra 4.3.1 today. This release contains fixes for a number of vulnerabilities, and all node operators are strongly encouraged to upgrade immediately. In addition to the security fix, this release introduces a Dockerized mining setup, automated checkpoint management, and a number of CI hardening improvements. Security Advisories CVE-2026-40880: Transaction Verification Cache Consensus […]
Zebra 4.3.0: Critical Security Fixes, ZIP-235 Support, and Performance Improvements
We are releasing Zebra 4.3.0 today. This release contains critical security fixes and all node operators are strongly encouraged to upgrade immediately. In addition to the security patches, this release introduces support for the Network Sustainability Mechanism (ZIP-235), improves developer tooling for performance profiling, and resolves several other bugs. Security Advisories CVE-2026-34202: Remote Denial of […]
Zebra 4.2.0 Release
Zcash Foundation is pleased to announce Zebra 4.2.0. This release expands RPC functionality, strengthens mempool policy compliance, and adds deeper state querying capabilities. This release also completes the migration to OpenRPC for API documentation and moves the Python QA test framework to the standalone integration-tests repository. What’s New in 4.2.0 RPC: A More Complete Interface […]
Zcash Foundation Q4 2025 Report
The Zcash Foundation is committed to transparency and openness with the Zcash community and our other stakeholders. Today, we are releasing our Q4 2025 report, which provides an overview of the work undertaken by our engineering team, as well as an overview of other activities during this period. As with our previous quarterly reports, this […]