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    "cveMetadata": {
        "cveId": "CVE-2026-123554",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-11-06T00:49:30.576Z",
        "datePublished": "2026-11-08T01:37:56.894Z",
        "dateUpdated": "2026-11-08T01:37:56.894Z"
    },
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                "dateUpdated": "2026-11-08T01:37:56.894Z"
            },
            "datePublic": "2026-10-22T00:00:00.000Z",
            "title": "Zebra zebrad 6.4.0 before 7.0.0 Denial of Service via Mempool Coinbase-Maturity Check",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Zebra zebrad 6.4.0 before 7.0.0 performs quadratic work in the mempool coinbase-maturity check because Transaction::coinbase_spend_restriction() rebuilds the transaction's output list once per spent outpoint. Any connected peer can repeatedly send unsigned transactions with many transparent inputs and outputs, which are rejected without a misbehavior score, to pin verification threads."
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Inefficient Algorithmic Complexity",
                            "cweId": "CWE-407",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "ZcashFoundation",
                    "product": "zebra",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:cargo/zebrad",
                    "versions": [
                        {
                            "version": "6.4.0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "7.0.0"
                        },
                        {
                            "version": "7.0.0",
                            "status": "unaffected",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
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                            "operator": "OR",
                            "negate": false,
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                                    "versionStartIncluding": "6.4.0",
                                    "versionEndExcluding": "7.0.0"
                                }
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                        "vectorString": "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",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 8.7,
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                    }
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                        "attackComplexity": "LOW",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "availabilityImpact": "HIGH",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH"
                    }
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            "references": [
                {
                    "url": "https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-7jp4-mq53-4cvq",
                    "tags": [
                        "vendor-advisory"
                    ],
                    "name": "GitHub Security Advisory (GHSA-7jp4-mq53-4cvq)"
                },
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                    "url": "https://github.com/ZcashFoundation/zebra/commit/08743d669b33a19bce2a5d54001bd468c03a196e",
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                    "tags": [
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                    "url": "https://www.vulncheck.com/advisories/zebra-zebrad-6.4.0-before-7.0.0-denial-of-service-via-mempool-coinbase-maturity-check"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "janneh2000",
                    "type": "reporter"
                },
                {
                    "lang": "en",
                    "value": "mpguerra",
                    "type": "coordinator"
                },
                {
                    "lang": "en",
                    "value": "conradoplg",
                    "type": "remediation developer"
                }
            ],
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                "engine": "vulncheck-endgame"
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        }
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}