ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-consensus version 5.0.1, a logic error in Zebra's transaction verification cache could allow a malicious miner to induce a consensus split. By matching a valid transaction's txid while providing invalid authorization data, a miner could cause vulnerable Zebra nodes to accept an invalid block, leading to a consensus split from the rest of the Zcash network. This would not allow invalid transactions to be accepted but could result in a consensus split between vulnerable Zebra nodes and invulnerable Zebra and Zcashd nodes. This issue has been patched in zebrad version 4.3.0 and zebra-consensus version 5.0.1.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-3vmh-33xr-9cqh Zebra has a Consensus Failure due to Improper Verification of V5 Transactions
Fixes

Solution

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Workaround

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History

Tue, 31 Mar 2026 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 31 Mar 2026 14:30:00 +0000

Type Values Removed Values Added
Description ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-consensus version 5.0.1, a logic error in Zebra's transaction verification cache could allow a malicious miner to induce a consensus split. By matching a valid transaction's txid while providing invalid authorization data, a miner could cause vulnerable Zebra nodes to accept an invalid block, leading to a consensus split from the rest of the Zcash network. This would not allow invalid transactions to be accepted but could result in a consensus split between vulnerable Zebra nodes and invulnerable Zebra and Zcashd nodes. This issue has been patched in zebrad version 4.3.0 and zebra-consensus version 5.0.1.
Title Zebra has a Consensus Failure due to Improper Verification of V5 Transactions
Weaknesses CWE-347
References
Metrics cvssV4_0

{'score': 8.4, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-31T17:18:12.932Z

Reserved: 2026-03-27T13:43:14.370Z

Link: CVE-2026-34377

cve-icon Vulnrichment

Updated: 2026-03-31T17:18:09.921Z

cve-icon NVD

Status : Received

Published: 2026-03-31T15:16:19.233

Modified: 2026-03-31T15:16:19.233

Link: CVE-2026-34377

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses