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CVE-2026-54496

Estado: AplazadaCrítica (9.3)—

ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad 5.0.0, halo2_gadgets 0.5.0, orchard 0.14.0, zcash_primitives 0.28.0, and zcashd 6.20.0, the variable-base scalar multiplication gadget in halo2_gadgets/src/ecc/chip/mul/incomplete.rs used assign_advice() for the base point without a copy constraint tying it to the actual base, allowing a malicious prover to produce a valid proof for an Orchard Action with an under-constrained base point and bypass the diversified-address-integrity check that binds pk_d, g_d, ivk, the nullifier (nf), and the spend validating key (ak) to the note being spent. This issue is fixed in zebrad 5.0.0, halo2_gadgets 0.5.0, orchard 0.14.0, zcash_primitives 0.28.0, and zcashd 6.20.0.

CVSS

Probabilidad de explotación (EPSS)

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.

Vector CVSS AV:N/AC:L/PR:N indica explotación remota sin privilegios (T1190). El atacante manipula pruebas criptográficas para falsificar transacciones válidas, alterando la integridad de datos en la cadena de bloques (T1565.002: manipulación de datos). La evasión del control criptográfico también s

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

Vulnerability ScanningUser TrainingPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkFilter Network Traffic

Tecnologías afectadas (5)

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

Electriccoin — ZcashdAIHalo2 Gadgets — Halo2 GadgetsAIOrchardproject — OrchardAIZcash Primitives — Zcash PrimitivesAIZebra — ZebradAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-54496",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-54496",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-07-17T17:23:34.445671Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 9.3,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 4.7,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "ZcashFoundation",
          "product": "zebra",
          "versions": [
            {
              "status": "affected",
              "version": "< 5.0.0"
            }
          ]
        },
        {
          "vendor": "zcash",
          "product": "halo2_gadgets",
          "versions": [
            {
              "status": "affected",
              "version": "< 0.5.0"
            }
          ]
        },
        {
          "vendor": "zcash",
          "product": "orchard",
          "versions": [
            {
              "status": "affected",
              "version": "< 0.14.0"
            }
          ]
        },
        {
          "vendor": "zcash",
          "product": "librustzcash",
          "versions": [
            {
              "status": "affected",
              "version": "< 0.28.0"
            }
          ]
        },
        {
          "vendor": "zcash",
          "product": "zcash",
          "versions": [
            {
              "status": "affected",
              "version": "< 6.20.0"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-07-17T17:17:16.620",
  "references": [
    {
      "url": "https://github.com/ZcashFoundation/zebra/releases/tag/v5.0.0",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-ww9q-8r59-xv46",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/zcash/halo2/releases/tag/halo2_gadgets-0.5.0",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/zcash/librustzcash/releases/tag/zcash_primitives-0.28.0",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/zcash/orchard/releases/tag/0.14.0",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/zcash/zcash/releases/tag/v6.20.0",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://zfnd.org/zebra-4-5-3-and-5-0-0-emergency-soft-fork-and-nu6-2-activation",
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-345"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad 5.0.0, halo2_gadgets 0.5.0, orchard 0.14.0, zcash_primitives 0.28.0, and zcashd 6.20.0, the variable-base scalar multiplication gadget in halo2_gadgets/src/ecc/chip/mul/incomplete.rs used assign_advice() for the base point without a copy constraint tying it to the actual base, allowing a malicious prover to produce a valid proof for an Orchard Action with an under-constrained base point and bypass the diversified-address-integrity check that binds pk_d, g_d, ivk, the nullifier (nf), and the spend validating key (ak) to the note being spent. This issue is fixed in zebrad 5.0.0, halo2_gadgets 0.5.0, orchard 0.14.0, zcash_primitives 0.28.0, and zcashd 6.20.0."
    }
  ],
  "lastModified": "2026-07-17T18:45:20.713",
  "sourceIdentifier": "security-advisories@github.com"
}