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VULNERABILITIES

CVE-2026-44498 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/ZcashFoundation/zebra/releases/tag/v4.4.0 [email protected]Release Notes
https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-jv4h-j224-23cc [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-682Incorrect Calculation[email protected]

Affected Products

ProductVersions
zfnd zebrad
< 4.4.0

CPE

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

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-44498
NVD Published Date:
May 8, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-44498 Details - Not Deferred