{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-123555", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-06T00:50:45.482Z", "datePublished": "2026-11-08T01:37:57.593Z", "dateUpdated": "2026-11-08T01:37:57.593Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-08T01:37:57.593Z"}, "datePublic": "2026-10-22T00:00:00.000Z", "title": "Zebra 2.3.0 before 7.0.0 Denial of Service via Unscored Script Verification Failures", "descriptions": [{"lang": "en", "value": "Zebra from 2.3.0 before 7.0.0 contains a denial of service vulnerability that allows unauthenticated peers to evade misbehavior scoring by sending transactions or blocks with invalid transparent scripts. Attackers can flood mempool with script-failing transactions or serve forged v5 block bodies with altered scriptSig bytes to exhaust CPU and repeatedly stall block sync."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improper Handling of Exceptional Conditions", "cweId": "CWE-755", "type": "CWE"}]}], "affected": [{"vendor": "ZcashFoundation", "product": "zebra", "defaultStatus": "unaffected", "packageURL": "pkg:cargo/zebrad", "versions": [{"version": "2.3.0", "status": "affected", "versionType": "semver", "lessThan": "7.0.0"}, {"version": "7.0.0", "status": "unaffected", "versionType": "semver"}]}, {"vendor": "ZcashFoundation", "product": "zebra", "defaultStatus": "unaffected", "packageURL": "pkg:cargo/zebra-consensus", "versions": [{"version": "1.0.0-beta.46", "status": "affected", "versionType": "semver", "lessThan": "18.0.0"}, {"version": "18.0.0", "status": "unaffected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:zfnd:zebra:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.3.0", "versionEndExcluding": "7.0.0"}, {"vulnerable": true, "criteria": "cpe:2.3:a:zfnd:zebra:*:*:*:*:*:*:*:*", "versionStartIncluding": "1.0.0-beta.46", "versionEndExcluding": "18.0.0"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "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, "baseSeverity": "HIGH"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH"}}], "references": [{"url": "https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-jq45-ghw5-v37x", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-jq45-ghw5-v37x)"}, {"url": "https://github.com/ZcashFoundation/zebra/commit/e8db87eb69254e0d4eedd058eadd48bdfa09065a", "tags": ["patch"], "name": "Patch Commit"}, {"name": "VulnCheck Advisory: Zebra 2.3.0 before 7.0.0 Denial of Service via Unscored Script Verification Failures", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/zebra-2.3.0-before-7.0.0-denial-of-service-via-unscored-script-verification-failures"}], "credits": [{"lang": "en", "value": "x15-eth", "type": "reporter"}, {"lang": "en", "value": "mpguerra", "type": "coordinator"}, {"lang": "en", "value": "conradoplg", "type": "remediation developer"}, {"lang": "en", "value": "upbqdn", "type": "remediation reviewer"}], "x_generator": {"engine": "vulncheck-endgame"}}}}