CVE-2026-54269

{
  "id": "CVE-2026-54269",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-22T18:16:45.350",
  "lastModified": "2026-10-25T23:10:00.167",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 8.6.0 and 7.6.3, protobufjs accepted certain schema-derived names that could collide with properties used by protobufjs runtime helpers. The known affected names are fields named hasOwnProperty, field or oneof names such as $type when loaded through protobufjs JSON/reflection descriptors, and service methods whose generated helper name is rpcCall. When affected message or service types were used, protobufjs could read schema-controlled data where it expected an own-property helper, reflected type metadata, or the base RPC helper. This could cause deterministic exceptions or recursive calls in affected decode post-checks, verification, object conversion, reflected JSON serialization, or protobufjs RPC helper invocation. This vulnerability is fixed in 8.6.0 and 7.6.3."
    },
    {
      "lang": "es",
      "value": "protobufjs compila definiciones de protobuf en funciones de JavaScript (JS). Antes de las versiones 8.6.0 y 7.6.3, protobufjs aceptaba ciertos nombres derivados del esquema que podían colisionar con propiedades utilizadas por los ayudantes de tiempo de ejecución de protobufjs. Los nombres afectados conocidos son campos llamados hasOwnProperty, nombres de campo o oneof como $type cuando se cargan a través de descriptores JSON/de reflexión de protobufjs, y métodos de servicio cuyo nombre de ayudante generado es rpcCall. Cuando se utilizaban tipos de mensaje o servicio afectados, protobufjs podía leer datos controlados por el esquema donde esperaba un ayudante de propiedad propia, metadatos de tipo reflejado o el ayudante RPC base. Esto podía causar excepciones deterministas o llamadas recursivas en comprobaciones posteriores de decodificación afectadas, verificación, conversión de objetos, serialización JSON reflejada o invocación del ayudante RPC de protobufjs. Esta vulnerabilidad está corregida en las versiones 8.6.0 y 7.6.3."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "protobufjs",
          "product": "protobuf.js",
          "versions": [
            {
              "version": "< 7.6.3",
              "status": "affected"
            },
            {
              "version": ">= 8.0.0, < 8.6.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-23T16:07:04.844722Z",
          "id": "CVE-2026-54269",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-674"
        },
        {
          "lang": "en",
          "value": "CWE-754"
        }
      ]
    }
  ],
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          "operator": "OR",
          "negate": false,
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  "references": [
    {
      "url": "https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-f38q-mgvj-vph7",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
      ]
    }
  ]
}