{"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":"2026-11-13T03:02:08.303Z"},"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"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-11-13T03:01:56.391913Z","id":"CVE-2026-123555","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-11-13T03:02:08.303Z"}}]}}