---
id: CVE-2026-34202
title: ZEBRA is a Zcash node written entirely in Rust
summary: >-
  ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0
  and zebra-chain version 6.0.1, a vulnerability in Zebra's transaction
  processing logic allows a remote, unauthenticated attacker to cause a Zebra
  node to panic…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-94
  - CWE-1336
  - CWE-502
vendor: zfnd
product: zebra
affected:
  - zebra < 4.3.0
  - zebra-chain < 6.0.1
patched:
  - zebra 4.3.0
  - zebra-chain 6.0.1
published: '2026-03-31'
updated: '2026-07-24'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-34202'
references:
  - url: 'https://github.com/ZcashFoundation/zebra/releases/tag/v4.3.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qp6f-w4r3-h8wg
    label: security-advisories@github.com
  - url: >-
      https://zfnd.org/zebra-4-3-0-critical-security-fixes-zip-235-support-and-performance-improvements
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00929
epssPercentile: 0.58868
ingestedAt: '2026-07-24T21:39:13.377Z'
---

## Overview

ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-chain version 6.0.1, a vulnerability in Zebra's transaction processing logic allows a remote, unauthenticated attacker to cause a Zebra node to panic (crash). This is triggered by sending a specially crafted V5 transaction that passes initial deserialization but fails during transaction ID calculation. This issue has been patched in zebrad version 4.3.0 and zebra-chain version 6.0.1.

## Affected

- `zebra < 4.3.0`
- `zebra-chain < 6.0.1`

## Remediation

Upgrade past the affected range:

- `zebra 4.3.0`
- `zebra-chain 6.0.1`