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 type is invalid, during sighash computation. Instead of returning an error, the normal flow would resume, and the input sighash buffer would be left untouched. In scenarios where a previous signature validation could leave a valid sighash in the buffer, an invalid hash-type could be incorrectly accepted, which would create a consensus split between Zebra and zcashd nodes. This issue has been patched in zebrad version 4.4.0 and zebra-script version 6.0.0.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-gq4h-3grw-2rhv	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:zfnd:zebra-script::::::rust::*
	cpe:2.3:a:zfnd:zebrad::::::rust::*

History

08 May 2026, 18:42

Type	Values Removed	Values Added
First Time		Zfnd zebra-script Zfnd zebrad Zfnd
CPE		cpe:2.3:a:zfnd:zebra-script::::::rust::* cpe:2.3:a:zfnd:zebrad::::::rust::*
References	~~() https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-gq4h-3grw-2rhv -~~	() https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-gq4h-3grw-2rhv - Vendor Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.1

08 May 2026, 15:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-08 15:17

Updated : 2026-05-08 18:42

NVD link : CVE-2026-44497

Mitre link : CVE-2026-44497

CVE.ORG link : CVE-2026-44497

JSON object : View

Products Affected

zfnd

zebrad
zebra-script

CWE

CWE-347

Improper Verification of Cryptographic Signature

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