CVE-2026-34202

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

State: Published
Severity: 9.2 Critical
Published: Mar 31, 2026
Updated: Mar 31, 2026
Reserved: Mar 26, 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.

Scores

CVSS	Score	Vector	Source
4.0	9.2 Critical	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	GitHub_M

Weaknesses

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

Affected Products

Product	Versions
zebraZcashFoundation	< 4.3.0Affected
zebra-chainZcashFoundation	< 6.0.1Affected

References

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