CVE-2026-40880
HIGH
MEDIUM
Priority: 0.02
BB Relevance:
64/100
Published: 2026-04-21
Modified: 2026-10-26
First seen: 2026-10-29
Status: active
Attack Surface
Network
Low Complexity
No Interaction
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
Low
UI:
None
S:
X
AT:
Present
VC:
None
VI:
High
VA:
High
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.
Weakness Classification (1)
Affected Software (2)
| Vendor | Product | Version |
|---|---|---|
| zfnd | zebra-consensus | < 5.0.2 |
| zfnd | zebrad | < 4.3.1 |
References & Advisories (1)
Vendor Advisory