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 rejects with bad-blk-sigops. A miner who produces such a block can split the network: Zebra nodes follow the offending chain while zcashd nodes do not. This issue has been patched in version 4.4.0.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/ZcashFoundation/zebra/releases/tag/v4.4.0	Release Notes
https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-jv4h-j224-23cc	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:zfnd:zebrad:*:*:*:*:*:rust:*:*

History

No history.

Information

Published : 2026-05-08 15:17

Updated : 2026-06-17 10:50

NVD link : CVE-2026-44498

Mitre link : CVE-2026-44498

CVE.ORG link : CVE-2026-44498

JSON object : View

Products Affected

zfnd

zebrad

CWE

CWE-682

Incorrect Calculation

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