Vulnerability Details CVE-2026-34377
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 5.3%
CVSS Severity
CVSS v3 Score 8.1
References
Products affected by CVE-2026-34377
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cpe:2.3:a:zfnd:zebra-consensus:1.0.0
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cpe:2.3:a:zfnd:zebra-consensus:2.0.0
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cpe:2.3:a:zfnd:zebra-consensus:3.0.0
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cpe:2.3:a:zfnd:zebra-consensus:3.1.0
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cpe:2.3:a:zfnd:zebra-consensus:3.1.1
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cpe:2.3:a:zfnd:zebra-consensus:3.1.2
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cpe:2.3:a:zfnd:zebra-consensus:4.0.0
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cpe:2.3:a:zfnd:zebra-consensus:5.0.0
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cpe:2.3:a:zfnd:zebra:1.0.0
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cpe:2.3:a:zfnd:zebra:1.0.1
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cpe:2.3:a:zfnd:zebra:1.1.0
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cpe:2.3:a:zfnd:zebra:1.2.0
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cpe:2.3:a:zfnd:zebra:1.3.0
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cpe:2.3:a:zfnd:zebra:1.4.0
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cpe:2.3:a:zfnd:zebra:1.5.0
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cpe:2.3:a:zfnd:zebra:1.5.1
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cpe:2.3:a:zfnd:zebra:1.5.2
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cpe:2.3:a:zfnd:zebra:1.6.0
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cpe:2.3:a:zfnd:zebra:1.6.1
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cpe:2.3:a:zfnd:zebra:1.7.0
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cpe:2.3:a:zfnd:zebra:1.8.0
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cpe:2.3:a:zfnd:zebra:1.9.0
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cpe:2.3:a:zfnd:zebra:2.0.0
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cpe:2.3:a:zfnd:zebra:2.0.1
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cpe:2.3:a:zfnd:zebra:2.1.0
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cpe:2.3:a:zfnd:zebra:2.2.0
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cpe:2.3:a:zfnd:zebra:2.3.0
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cpe:2.3:a:zfnd:zebra:2.4.0
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cpe:2.3:a:zfnd:zebra:2.4.2
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cpe:2.3:a:zfnd:zebra:2.5.0
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cpe:2.3:a:zfnd:zebra:3.0.0
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cpe:2.3:a:zfnd:zebra:3.1.0
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cpe:2.3:a:zfnd:zebra:4.0.0
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cpe:2.3:a:zfnd:zebra:4.1.0
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cpe:2.3:a:zfnd:zebra:4.2.0