CVE-2026-34202

CRITICAL9.2

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

Published Mar 31, 2026

Modified 3 weeks ago

Details

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.

References

WEB

https://github.com/ZcashFoundation/zebra/releases/tag/v4.3.0

WEB

https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qp6f-w4r3-h8wg

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-34202

WEB

https://zfnd.org/zebra-4-3-0-critical-security-fixes-zip-235-support-and-performance-improvements

CVSS Analysis

CVSS v4.0

9.2