What is CVE-2026-44497?

CVE-2026-44497 is a critical-severity vulnerability in Zcashfoundation Zebra, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.1/10. Published 2026-05-08.

How severe is CVE-2026-44497?

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

Vulnerability in Zcashfoundation Zebra

CVE-2026-44497

ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.4.0 and prior to zebra-script version 6.0.0, the fix for CVE-2026-41583 introduced a separate issue due to insufficient error handling of the case where the sighash…

EPSS: 0.000 (6.8th 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 zebra-script < 6.0.0, zebrad < 4.4.0
Zfnd Zebrad
Zfnd Zebra-script

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-gq4h-3grw-2rhv (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-44497?: CVE-2026-44497 is a critical-severity vulnerability in Zcashfoundation Zebra, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.1/10. Published 2026-05-08.
How severe is CVE-2026-44497?: Critical severity. CVSS v3 base score is 9.1 out of 10.