{"id":"CVE-2026-123554","aliases":[],"cve":{"records":[{"id":"CVE-2026-123554","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-11-06T00:49:30.576Z","published":"2026-11-08T01:37:56.894Z","modified":"2026-11-09T13:58:24.460Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-11-08T01:37:56.894Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-11-09T13:58:24.460Z"}],"references":[{"url":"https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-7jp4-mq53-4cvq","tags":["vendor-advisory"],"source":"VulnCheck"},{"url":"https://github.com/ZcashFoundation/zebra/commit/08743d669b33a19bce2a5d54001bd468c03a196e","tags":["patch"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/zebra-zebrad-6.4.0-before-7.0.0-denial-of-service-via-mempool-coinbase-maturity-check","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-407","description":"Inefficient Algorithmic Complexity","source":"VulnCheck"}],"applicability":[{"source":"VulnCheck","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:zfnd:zebra:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4.0","versionEndExcluding":"7.0.0"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-11-09T13:58:14.717442Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"yes"},{"name":"Technical Impact","value":"partial"}]}]},"title":"Zebra zebrad 6.4.0 before 7.0.0 Denial of Service via Mempool Coinbase-Maturity Check","titleSource":"VulnCheck","descriptionSource":"VulnCheck","description":"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threads.","score":8.7,"severity":"high","published":"2026-11-08T01:37:56.894Z","modified":"2026-11-09T13:58:24.460Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"ZcashFoundation","name":"zebra","platforms":[],"versions":[{"version":"6.4.0","status":"affected","lessThan":"7.0.0","versionType":"semver"},{"version":"7.0.0","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:cargo/zebrad","packageIdentity":{"ecosystem":"crates.io","name":"zebrad"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-123554"}],"remediation":[],"references":["https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-7jp4-mq53-4cvq","https://github.com/ZcashFoundation/zebra/commit/08743d669b33a19bce2a5d54001bd468c03a196e","https://www.vulncheck.com/advisories/zebra-zebrad-6.4.0-before-7.0.0-denial-of-service-via-mempool-coinbase-maturity-check"],"sources":[{"name":"CVE","id":"CVE-2026-123554","modified":"2026-11-09T13:58:24.460Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-123554"}],"assessments":[{"source":"VulnCheck","vector":"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","score":8.7},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5}],"sourceAffected":[],"observedAt":"2026-11-09T14:11:12.669Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T00:20:33.177Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-08T03:10:31.155Z","attemptedAt":"2026-11-08T03:10:31.155Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-08T03:10:30.483Z","attemptedAt":"2026-11-08T03:10:30.483Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-08T03:10:31.155Z","attemptedAt":"2026-11-08T03:10:31.155Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-08T03:10:30.483Z","attemptedAt":"2026-11-08T03:10:30.483Z"}],"evidence":[{"source":"ENISA EUVD","id":"EUVD-2026-119439","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-119439","modified":"Nov 8, 2026, 1:37:56 AM","score":8.7,"vector":"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","checkedAt":"2026-11-08T03:10:31.155Z"},{"source":"NVD","id":"CVE-2026-123554","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123554","modified":"2026-11-08T02:16:47.263","score":8.7,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","checkedAt":"2026-11-08T03:10:31.155Z"},{"source":"NVD","id":"CVE-2026-123554","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123554","modified":"2026-11-08T02:16:47.263","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","checkedAt":"2026-11-08T03:10:31.155Z"}],"aiSummary":{"text":"Zebra zebrad versions 6.4.0 before 7.0.0 have a denial of service weakness due to inefficient algorithmic complexity in the mempool coinbase-maturity check. Any connected peer can send unsigned transactions to pin verification threads. This is caused by quadratic work in Transaction::coinbase_spend_restriction().","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-08T02:21:17.191Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-123554"}]}}