Is CVE-2026-40880 actively exploited?

No active exploitation of CVE-2026-40880 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40880 be exploited remotely?

Yes. CVE-2026-40880 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-40880?

CVE-2026-40880 has a CVSS score of 8.1 (HIGH).

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HIGH

CVE-2026-40880

CWE-1025Published: April 21, 2026· Updated: Apr 27, 2026

8.1

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:12.8th

Official 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.

NVD Source

Technical Analysis

CVE-2026-40880 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.1.