What is CVE-2026-44498?

CVE-2026-44498 is a high-severity vulnerability in Zcashfoundation Zebra, classified under Incorrect Calculation. CVSS score: 7.5/10. Published 2026-05-08.

How severe is CVE-2026-44498?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Zcashfoundation Zebra

CVE-2026-44498

ZEBRA is a Zcash node written entirely in Rust. Prior to version 4.4.0, Zebra's block validator undercounts transparent signature operations against the 20000-sigop block limit (MAX_BLOCK_SIGOPS), allowing it to accept blocks that zcashd r…

EPSS: 0.000 (2.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Zcashfoundation Zebra — versions < 4.4.0
Zfnd Zebrad

Weakness classification (CWE)

CWE-682 — Incorrect Calculation

References

https://github.com/ZcashFoundation/zebra/releases/tag/v4.4.0 (x_refsource_MISC, Release Notes)
https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-jv4h-j224-23cc (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-44498?: CVE-2026-44498 is a high-severity vulnerability in Zcashfoundation Zebra, classified under Incorrect Calculation. CVSS score: 7.5/10. Published 2026-05-08.
How severe is CVE-2026-44498?: High severity. CVSS v3 base score is 7.5 out of 10.