{"id":"CVE-2026-104435","summary":"Zebra 4.4.0 Consensus Divergence via V5 SIGHASH_SINGLE Without Output","details":"Zebra zebrad 4.4.0 and zebra-script 6.0.0 fail to enforce a ZIP-244 consensus rule, accepting V5 transparent inputs signed with SIGHASH_SINGLE that lack a corresponding output. Attackers can broadcast crafted V5 transactions with more inputs than outputs that Zebra accepts but zcashd rejects, causing a network consensus split.","aliases":["GHSA-pvmv-cwg8-v6c8"],"modified":"2026-10-04T02:30:32.380790240Z","published":"2026-10-02T11:38:12.487Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104435.json","unresolved_ranges":[{"extracted_events":[{"introduced":"6.0.0"},{"fixed":"6.0.1"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"VulnCheck","cwe_ids":["CWE-347"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104435.json"},{"type":"ADVISORY","url":"https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-pvmv-cwg8-v6c8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-104435"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/zebra-4.4.0-consensus-divergence-via-v5-sighash-single-without-output"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/zcashfoundation/zebra","events":[{"introduced":"589d64b9b7ea6ab4c32ecab41ba6b74f26907940"},{"fixed":"1ec1078e242c295bc9e80bc2087a663444772fa3"}],"database_specific":{"extracted_events":[{"introduced":"4.4.0"},{"fixed":"4.4.1"}],"source":"AFFECTED_FIELD"}}],"versions":["v4.4.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-104435.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N"}]}