Home/CVE/ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-chain version 6.0.1, a vulnerabi
CVE

CVE-2026-34202

ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-chain version 6.0.1, a vulnerabi

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.

HIGH · CVSS 7.5 EPSS 0.00153
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
CWE-502Deserialization of Untrusted Data
CWE-94Improper Control of Generation of Code ('Code Injection')
▤

Affected Products & Versions

2
zfnd zebra< 4.3.0
zfnd zebra-chain< 6.0.1
▤

Affected Packages

2
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
crates.io zebra-chain CRITICAL fixed in 6.0.1
crates.io zebrad CRITICAL fixed in 4.3.0
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD31 Mar 2026 · 03:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
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
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