CVE-2026-104430

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Source

https://cve.org/CVERecord?id=CVE-2026-104430

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-104430.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-104430

Aliases

GHSA-2prc-cj5x-4443

Published

2026-10-02T11:38:09Z

Modified

2026-10-04T02:46:34Z

Severity

8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

Zebra 4.5.0 Consensus Split via P2SH Sigop Overcount

Details

Zebra zebrad 4.5.0 and zebra-script 7.0.0 count P2SH redeem script signature operations in legacy mode rather than zcashd's accurate P2SH mode, overcounting CHECKMULTISIG preceded by OP_1 through OP_16 as 20 sigops and causing a consensus divergence. Remote attackers can broadcast P2SH spends using low-threshold multisig redeem scripts so that a block zcashd accepts exceeds Zebra's inflated MAX_BLOCK_SIGOPS count, causing Zebra nodes to reject it and stall off the chain.

Database specific

{
    "cna_assigner":  "VulnCheck",
    "cwe_ids":  [
        "CWE-628"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104430.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "introduced":  "7.0.0"
                },
                {
                    "fixed":  "7.0.1"
                }
            ],
            "source":  "AFFECTED_FIELD"
        }
    ]
}

References

Affected packages

Git / github.com/zcashfoundation/zebra

Affected ranges

Type

GIT

Repo

https://github.com/zcashfoundation/zebra

Events

Introduced

1440b43ca7df59aca948090d45117557b217a6cd

Fixed

76c440e67f2c909cbf8418b11a3f56371aed7d95

Database specific

Show details

{
    "extracted_events":  [
        {
            "introduced":  "4.5.0"
        },
        {
            "fixed":  "4.5.1"
        },
        {
            "introduced":  "OP_1"
        },
        {
            "fixed":  "OP_16"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Affected versions

v4.*

v4.5.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-104430.json"