# CVE-2026-40880

## Summary

- **CVE ID:** CVE-2026-40880
- **Severity:** HIGH
- **CVSS Score:** 7.2 (CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H)
- **CWE:** CWE-1025
- **Published:** Apr 21, 2026
- **Last Modified:** Apr 21, 2026

## 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.

## Affected Products

- ZcashFoundation — zebrad (< 4.3.1)
- ZcashFoundation — zebra-consensus (< 5.0.2)

## References

- [CNA](https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-xvj8-ph7x-65gf)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.26%
- **EPSS Percentile:** 17.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._