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.
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Wed, 22 Apr 2026 12:15:00 +0000
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Zcashfoundation zebra-consensus Zcashfoundation zebrad |
Wed, 22 Apr 2026 00:00:00 +0000
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| Description | 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. | |
| Title | Zebra: Cached Mempool Verification Bypasses Consensus Rules for Ahead-of-Tip Blocks | |
| Weaknesses | CWE-1025 | |
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cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-04-21T19:18:22.657Z
Updated: 2026-04-21T19:52:58.880Z
Reserved: 2026-04-15T15:57:41.719Z
Link: CVE-2026-40880
Updated: 2026-04-21T19:52:54.543Z
Status : Awaiting Analysis
Published: 2026-04-21T20:17:01.687
Modified: 2026-04-22T21:24:26.997
Link: CVE-2026-40880
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