Vulnerability Details CVE-2026-40880
ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.1 and zebra-consensus version 5.0.2, a logic error in Zebra's transaction verification cache could allow a malicious miner to induce a consensus split. By carefully submitting a transaction that is valid for height H+1 but invalid for H+2 and then mining that transaction in a block at height H+2, 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 vulnerability is fixed in zebrad version 4.3.1 and zebra-consensus version 5.0.2.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 17.4%
CVSS Severity
CVSS v3 Score 8.1
Products affected by CVE-2026-40880
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cpe:2.3:a:zfnd:zebra-consensus:*
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cpe:2.3:a:zfnd:zebrad:1.0.0
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cpe:2.3:a:zfnd:zebrad:1.0.1
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cpe:2.3:a:zfnd:zebrad:1.1.0
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cpe:2.3:a:zfnd:zebrad:1.2.0
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cpe:2.3:a:zfnd:zebrad:1.3.0
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cpe:2.3:a:zfnd:zebrad:1.4.0
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cpe:2.3:a:zfnd:zebrad:1.5.0
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cpe:2.3:a:zfnd:zebrad:1.5.2
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cpe:2.3:a:zfnd:zebrad:1.6.0
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cpe:2.3:a:zfnd:zebrad:1.6.1
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cpe:2.3:a:zfnd:zebrad:1.7.0
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cpe:2.3:a:zfnd:zebrad:1.8.0
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cpe:2.3:a:zfnd:zebrad:1.9.0
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cpe:2.3:a:zfnd:zebrad:2.0.1
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cpe:2.3:a:zfnd:zebrad:2.1.0
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cpe:2.3:a:zfnd:zebrad:2.2.0
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cpe:2.3:a:zfnd:zebrad:2.3.0
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cpe:2.3:a:zfnd:zebrad:2.4.0
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cpe:2.3:a:zfnd:zebrad:2.4.1
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cpe:2.3:a:zfnd:zebrad:2.4.2
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cpe:2.3:a:zfnd:zebrad:2.5.0
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cpe:2.3:a:zfnd:zebrad:3.0.0
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cpe:2.3:a:zfnd:zebrad:3.1.0
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cpe:2.3:a:zfnd:zebrad:4.0.0
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cpe:2.3:a:zfnd:zebrad:4.1.0
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cpe:2.3:a:zfnd:zebrad:4.2.0
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cpe:2.3:a:zfnd:zebrad:4.3.0