CVE-2026-34202

HighCVSS 7.5/10Last modified Jul 24, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-94 CWE-1336 CWE-502

Affected software

Vendor	Product	Versions
ZcashFoundation	zebra	< 4.3.0
ZcashFoundation	zebra-chain	< 6.0.1

References

https://github.com/ZcashFoundation/zebra/releases/tag/v4.3.0Release Notes
https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qp6f-w4r3-h8wgVendor Advisory
https://zfnd.org/zebra-4-3-0-critical-security-fixes-zip-235-support-and-performance-improvementsVendor Advisory

Timeline

Published: Mar 31, 2026
Last modified: Jul 24, 2026
NVD status: Analyzed

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