---
id: CVE-2026-104435
title: >-
  Zebra zebrad 4.4.0 and zebra-script 6.0.0 fail to enforce a ZIP-244 consensus
  rule, accepting V5 transparent inputs signed with SIGHASH_SINGLE that lack a
  corresponding output
summary: >-
  Zebra zebrad 4.4.0 and zebra-script 6.0.0 fail to enforce a ZIP-244 consensus
  rule, accepting V5 transparent inputs signed with SIGHASH_SINGLE that lack a
  corresponding output. Attackers can broadcast crafted V5 transactions with
  more in…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-347
vendor: ZcashFoundation
product: zebra
affected:
  - zebra >= 4.4.0 < 4.4.1
  - zebra >= 6.0.0 < 6.0.1
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T12:17:14.063'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-104435'
references:
  - url: >-
      https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-pvmv-cwg8-v6c8
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/zebra-4.4.0-consensus-divergence-via-v5-sighash-single-without-output
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-02T12:17:44.334Z'
---

## Overview

Zebra zebrad 4.4.0 and zebra-script 6.0.0 fail to enforce a ZIP-244 consensus rule, accepting V5 transparent inputs signed with SIGHASH_SINGLE that lack a corresponding output. Attackers can broadcast crafted V5 transactions with more inputs than outputs that Zebra accepts but zcashd rejects, causing a network consensus split.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.