CVE-2026-104435

Estado: AplazadaAlta (8.3)—

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.

CVSS

Versión: 4.0
Vector: 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/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
Puntuación base: 8.3

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.21%
Percentil entre todas las CVEs puntuadas: 10
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access85 %
Impacto principalT1553.003 SIP and Trust Provider Hijackingdefense impairment80 %
Impacto secundarioT1498.002 Reflection Amplificationimpact70 %

Red sin privilegios (AV:N/PR:N). El atacante difunde transacciones V5 manipuladas que rompen consenso de red: aceptadas por Zebra pero rechazadas por zcashd causa partición de red (DoS distribuido), violando integridad del libro mayor (T1553.003: subversión de integridad de datos).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network Traffic Vulnerability Scanning Restrict File and Directory Permissions Restrict Registry Permissions Privileged Account Management Network Segmentation

Tecnologías afectadas (2)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Zebra — Zebra Script^AI Zebra — Zebrad^AI

CWE

CWE-347

Referencias

JSON original (NVD)

Mostrar

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  "id": "CVE-2026-104435",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2026-104435",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-10-02T15:16:28.895399Z"
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      }
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          "attackVector": "NETWORK",
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          "modifiedUserInteraction": "NOT_DEFINED",
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          "modifiedAttackRequirements": "NOT_DEFINED",
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          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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  "affected": [
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      "affectedData": [
        {
          "vendor": "ZcashFoundation",
          "product": "zebra",
          "versions": [
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              "version": "4.4.0",
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              "version": "6.0.1",
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          "packageURL": "pkg:cargo/zebra-script",
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  "published": "2026-10-02T12:17:14.063",
  "references": [
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      "url": "https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-pvmv-cwg8-v6c8",
      "source": "disclosure@vulncheck.com"
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      "description": [
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          "value": "CWE-347"
        }
      ]
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  ],
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    {
      "lang": "en",
      "value": "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."
    }
  ],
  "lastModified": "2026-10-02T17:59:09.430",
  "sourceIdentifier": "disclosure@vulncheck.com"
}