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High

Zebra before 4.4.0 Consensus Split via SIGHASH_SINGLE Missing-Output Handling

Type: advisorySource: Official CVE List1 source record

Zebra before 4.4.0 contains a consensus divergence vulnerability in V5 transparent signature verification, computing a ZIP-244 digest for SIGHASH_SINGLE inputs lacking corresponding outputs instead of failing. Attackers can craft V5 transactions with fewer outputs than inputs that Zebra accepts and templates via getblocktemplate, producing blocks zcashd rejects.

Announced Source revision 1
Original source ↗

CVE-2026-104437

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-104437

zebra

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "ZcashFoundation",
    "product": "zebra",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "4.4.0",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "4.4.0",
        "versionType": "semver"
      }
    ],
    "packageURL": "pkg:cargo/zebrad",
    "defaultStatus": "unaffected"
  }
]
Related CVEs
CVE-2026-104437

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#9004 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement