CVE-2026-34202 PUBLISHED

Zebra node crash — V5 transaction hash panic (P2P reachable)

Assigner: GitHub_M
Reserved: 26.03.2026 Published: 31.03.2026 Updated: 31.03.2026

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 4.0

CVSS Vector: 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
CVSS Score: 9.2

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	High	Availability	High
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	ZcashFoundation
Product	zebra
Versions	Version < 4.3.0 is affected

Vendor	ZcashFoundation
Product	zebra-chain
Versions	Version < 6.0.1 is affected

References

Problem Types

CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine CWE
CWE-94: Improper Control of Generation of Code ('Code Injection') CWE