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CVE-2026-34202— Zebra node crash — V5 transaction hash panic (P2P reachable)

Quick assessment

Affected
ZcashFoundation zebra
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

zebra是Zcash Foundation开源的一个用Rust编写的Zcash全节点实现。 zebra存在安全漏洞，该漏洞源于Zebra的交易处理逻辑存在漏洞，可能导致远程未经身份验证的攻击者通过发送特制的V5交易使Zebra节点崩溃。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.93% · P60

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-34202

Vulnerability Information
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Vulnerability Title
Zebra node crash — V5 transaction hash panic (P2P reachable)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1336
Source: CVE Program / CVE List V5
Vulnerability Title
zebra 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
zebra是Zcash Foundation开源的一个用Rust编写的Zcash全节点实现。 zebra存在安全漏洞，该漏洞源于Zebra的交易处理逻辑存在漏洞，可能导致远程未经身份验证的攻击者通过发送特制的V5交易使Zebra节点崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ZcashFoundation zebra < 4.3.0 -
ZcashFoundation zebra-chain < 6.0.1 -

II. Public POCs for CVE-2026-34202

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III. Intelligence Information for CVE-2026-34202

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Vendor Advisories for CVE-2026-34202 (2)

IV. Related Vulnerabilities

Same product: zebra
Same vendor: ZcashFoundation
Same weakness: CWE-1336

V. Comments for CVE-2026-34202

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