{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-104426","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-10-02T00:46:23.830Z","datePublished":"2026-10-02T11:38:07.187Z","dateUpdated":"2026-10-02T15:18:42.536Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-10-02T11:38:07.187Z"},"datePublic":"2026-07-17T00:00:00.000Z","title":"Zebra before 6.1.0 Quadratic Complexity DoS via Block Transparent Value Check","descriptions":[{"lang":"en","value":"Zebra before 6.1.0 contains an inefficient algorithmic complexity vulnerability in remaining_transaction_value that clones the entire block-level spent-UTXO map per transaction during contextual verification. Attackers can mine or seed the mempool with roughly 26,000 minimal single-input transactions in one block, stalling every validating node for over 52 seconds."}],"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":"0","status":"affected","versionType":"semver","lessThan":"6.1.0"},{"version":"6.1.0","status":"unaffected","versionType":"semver"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:zfnd:zebra:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.0"}]}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.2,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":5.9,"baseSeverity":"MEDIUM"}}],"references":[{"url":"https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-4g24-549m-hp75","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-4g24-549m-hp75)"},{"name":"VulnCheck Advisory: Zebra before 6.1.0 Quadratic Complexity DoS via Block Transparent Value Check","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/zebra-before-6.1.0-quadratic-complexity-dos-via-block-transparent-value-check"}],"credits":[{"lang":"en","value":"ValarDragon","type":"reporter"},{"lang":"en","value":"oxarbitrage","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-02T15:18:27.097171Z","id":"CVE-2026-104426","options":[{"Exploitation":"none"},{"Automatable":"no"},{"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":"2026-10-02T15:18:42.536Z"}}]}}