What is CVE-2026-40880?

CVE-2026-40880 is a high-severity vulnerability in Zcashfoundation Zebra-consensus, classified under CWE-1025. CVSS score: 8.1/10. Published 2026-04-21.

How severe is CVE-2026-40880?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Zcashfoundation Zebra-consensus

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 carefull…

EPSS: 0.003 (17.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

Affected products

Zcashfoundation Zebra-consensus — versions < 5.0.2
Zcashfoundation Zebrad — versions < 4.3.1
Zfnd Zebra-consensus
Zfnd Zebrad

Weakness classification (CWE)

CWE-1025

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-40880?: CVE-2026-40880 is a high-severity vulnerability in Zcashfoundation Zebra-consensus, classified under CWE-1025. CVSS score: 8.1/10. Published 2026-04-21.
How severe is CVE-2026-40880?: High severity. CVSS v3 base score is 8.1 out of 10.