---
id: CVE-2026-52829
title: ZEBRA is a Zcash node written entirely in Rust
summary: >-
  ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, an
  unauthenticated IPv4 peer can deterministically terminate a synced Zebra node
  using the default Linux dual-stack listener configuration. The handshake path
  canonicalized …
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-617
  - CWE-843
vendor: zebra-network
product: zebra-network
affected:
  - zebra-network <= 6.0.0
  - zebrad <= 4.4.1
patched:
  - zebra-network 7.0.0
  - zebrad 4.5.0
published: '2026-08-18'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:13:25.910'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-52829'
references:
  - url: >-
      https://github.com/ZcashFoundation/zebra/commit/1440b43ca7df59aca948090d45117557b217a6cd
    label: security-advisories@github.com
  - url: 'https://github.com/ZcashFoundation/zebra/releases/tag/v4.5.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-63wg-wjjj-7cp8
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-63wg-wjjj-7cp8'
tags:
  - nvd
  - ghsa
  - rust
epss: 0.00432
epssPercentile: 0.36985
ecosystem: rust
ingestedAt: '2026-07-02T20:42:45.642Z'
---

## Overview

ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, an unauthenticated IPv4 peer can deterministically terminate a synced Zebra node using the default Linux dual-stack listener configuration. The handshake path canonicalized an IPv4-mapped IPv6 PeerSocketAddr such as ::ffff:127.0.0.1 to plain IPv4 before storing it through MetaAddr::new_connected, but the mempool misbehavior path forwarded the raw transient address to MetaAddrChange::UpdateMisbehavior. In zebra-network/src/meta_addr.rs, apply_to_meta_addr then compared the canonical address-book entry with the raw update address and reached its unexpected address mismatch assertion. After the misbehavior batch flush, panic equals abort terminated zebrad; the peer only needed to complete a P2P handshake and advertise an invalid mempool transaction. This issue is fixed in version 4.5.0.

## Remediation

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

## Package advisory (CVE-2026-52829)

Affected packages:

- `zebra-network <= 6.0.0`
- `zebrad <= 4.4.1`

Patched in:

- `zebra-network 7.0.0`
- `zebrad 4.5.0`

Source: https://github.com/advisories/GHSA-63wg-wjjj-7cp8