CVE-2026-40880
High · 8.1CVSS
8.1
EPSS
0.4%
Published
Apr 21, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| crates.io | zebra-consensus | 0 | 5.0.2 |
| crates.io | zebrad | 0 | 4.3.1 |
Related vulnerabilities
- GHSA-xvj8-ph7x-65gf Zebra: Cached Mempool Verification Bypasses Consensus Rules for Ahead-of-Tip Blocks Same vulnerability
- CVE-2026-34377 ZEBRA is a Zcash node written entirely in Rust. Also affects zebra-consensus
- GHSA-3vmh-33xr-9cqh Zebra has a Consensus Failure due to Improper Verification of V5 Transactions Also affects zebra-consensus
- GHSA-h9hm-m2xj-4rq9 Zebra has Permanent Block Discovery Halt via Gossip Queue Saturation and Syncer Poisoning Also affects zebrad
- GHSA-pvmv-cwg8-v6c8 Zebra v4.4.0 still accepts V5 SIGHASH_SINGLE without a corresponding output Also affects zebrad
- CVE-2026-44499 ZEBRA is a Zcash node written entirely in Rust. Also affects zebrad
- CVE-2026-44497 ZEBRA is a Zcash node written entirely in Rust. Also affects zebrad
- CVE-2026-44498 ZEBRA is a Zcash node written entirely in Rust. Also affects zebrad