{"schema":"threatline.record/2","record":{"id":"CVE-2026-104430","aliases":["GHSA-2prc-cj5x-4443"],"summary":"Zebra 4.5.0 Consensus Split via P2SH Sigop Overcount","details":"Zebra zebrad 4.5.0 and zebra-script 7.0.0 count P2SH redeem script signature operations in legacy mode rather than zcashd's accurate P2SH mode, overcounting CHECKMULTISIG preceded by OP_1 through OP_16 as 20 sigops and causing a consensus divergence. Remote attackers can broadcast P2SH spends using low-threshold multisig redeem scripts so that a block zcashd accepts exceeds Zebra's inflated MAX_BLOCK_SIGOPS count, causing Zebra nodes to reject it and stall off the chain.","categories":["Unclassified"],"product":"zebra","vendor":"ZcashFoundation","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-104430","source_modified_at":"2026-10-02T15:17:44.203Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"zebra","vendor":"ZcashFoundation","versions":[{"version":"4.5.0","status":"affected","versionType":"semver","lessThan":"4.5.1"},{"version":"4.5.1","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-104430","source_modified_at":"2026-10-02T15:17:44.203Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"zebra","vendor":"ZcashFoundation","versions":[{"version":"7.0.0","status":"affected","versionType":"semver","lessThan":"7.0.1"},{"version":"7.0.1","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-104430","source_modified_at":"2026-10-02T15:17:44.203Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"zebra","ecosystem":null},"version":"4.5.1","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-104430","source_modified_at":"2026-10-02T15:17:44.203Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"zebra","ecosystem":null},"version":"7.0.1","basis":"first unaffected version stated in the CVE record"}],"cvss":8.7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00409,"percentile":0.34111,"score_date":"2026-10-23"},"published_at":"2026-10-02T11:38:09.916Z","modified_at":"2026-10-02T15:17:44.203Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-104430","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-02T15:17:44.203Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-104430","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-2prc-cj5x-4443","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/zebra-4.5.0-consensus-split-via-p2sh-sigop-overcount","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-02T15:17:26.296433Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-02T15:17:44.203Z","content_hash":"c5de1c77b91a20aaf15813c216c053a26e36e70a6ec1ebf4ce1e1446dd019648"}}