High severity · published Mar 31, 2026
CVE-2026-34202
Zebra node crash — V5 transaction hash panic (P2P reachable)
7.5
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZE
zebra · ZcashFoundation
< 4.3.0 · source: vendor, NVD
ZE
zebra-chain · ZcashFoundation
< 6.0.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-34202
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-34202
Release Notes
https://github.com/ZcashFoundation/zebra/releases/tag/v4.3.0
Vendor Advisory
https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qp6f-w4r3-h8wg
Vendor Advisory
https://zfnd.org/zebra-4-3-0-critical-security-fixes-zip-235-support-and-performance-improvements
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