CVE-2026-34202
Zebra node crash — V5 transaction hash panic (P2P reachable)
Description
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.
INFO
Published Date :
March 31, 2026, 3:16 p.m.
Last Modified :
July 24, 2026, 9:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-34202
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Update zebrad to version 4.3.0 or later.
- Update zebra-chain to version 6.0.1 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-34202.
| URL | Resource |
|---|---|
| https://github.com/ZcashFoundation/zebra/releases/tag/v4.3.0 | Release Notes |
| https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qp6f-w4r3-h8wg | Vendor Advisory |
| https://zfnd.org/zebra-4-3-0-critical-security-fixes-zip-235-support-and-performance-improvements | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-34202 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-34202
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-34202 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-34202 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 24, 2026
Action Type Old Value New Value Added Translation Title: ZcashFoundation, Description: ZEBRA es un nodo Zcash escrito completamente en Rust. Antes de la versión 4.3.0 de zebrad y la versión 6.0.1 de zebra-chain, una vulnerabilidad en la lógica de procesamiento de transacciones de Zebra permite a un atacante remoto y no autenticado provocar que un nodo Zebra entre en pánico (falle). Esto se activa al enviar una transacción V5 especialmente diseñada que pasa la deserialización inicial pero falla durante el cálculo del ID de la transacción. Este problema ha sido parcheado en la versión 4.3.0 de zebrad y la versión 6.0.1 de zebra-chain. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'ZcashFoundation', 'product': 'zebra', 'versions': [{'status': 'affected', 'version': '< 4.3.0'}]}, {'vendor': 'ZcashFoundation', 'product': 'zebra-chain', 'versions': [{'status': 'affected', 'version': '< 6.0.1'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-34202', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-03-31T17:16:55.754237Z'} -
Initial Analysis by [email protected]
Apr. 07, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-502 Added CPE Configuration OR *cpe:2.3:a:zfnd:zebra:*:*:*:*:*:rust:*:* versions up to (excluding) 4.3.0 *cpe:2.3:a:zfnd:zebra-chain:*:*:*:*:*:rust:*:* versions up to (excluding) 6.0.1 Added Reference Type GitHub, Inc.: https://github.com/ZcashFoundation/zebra/releases/tag/v4.3.0 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qp6f-w4r3-h8wg Types: Vendor Advisory Added Reference Type GitHub, Inc.: https://zfnd.org/zebra-4-3-0-critical-security-fixes-zip-235-support-and-performance-improvements Types: Vendor Advisory -
New CVE Received by [email protected]
Mar. 31, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-94 Added CWE CWE-1336 Added Reference https://github.com/ZcashFoundation/zebra/releases/tag/v4.3.0 Added Reference https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qp6f-w4r3-h8wg Added Reference https://zfnd.org/zebra-4-3-0-critical-security-fixes-zip-235-support-and-performance-improvements