What is CVE-2026-41583?

CVE-2026-41583 is a critical-severity vulnerability in Zcashfoundation Zebra, classified under CWE-573. CVSS score: 9.1/10. Published 2026-05-08.

How severe is CVE-2026-41583?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Zcashfoundation Zebra

CVE-2026-41583

ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.1 and prior to zebra-script version 5.0.2, after a refactoring, Zebra failed to validate a consensus rule that restricted the possible values of sighash hash types…

EPSS: 0.001 (20.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

Zcashfoundation Zebra — versions zebrad < 4.3.1, zebra-script < 5.0.2
Zfnd Zebrad
Zfnd Zebra-script

Weakness classification (CWE)

CWE-573

References

https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-8m29-fpq5-89jj (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-41583?: CVE-2026-41583 is a critical-severity vulnerability in Zcashfoundation Zebra, classified under CWE-573. CVSS score: 9.1/10. Published 2026-05-08.
How severe is CVE-2026-41583?: Critical severity. CVSS v3 base score is 9.1 out of 10.