CVE-2026-53609

{
  "id": "CVE-2026-53609",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-12T22:16:52.803",
  "lastModified": "2026-10-25T23:10:00.167",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "ApostropheCMS is an open-source Node.js content management system. In versions up to and including 4.30.0, `apos.util.set()` traverses dot-notation paths without sanitizing `__proto__`, allowing an authenticated editor to write arbitrary values to `Object.prototype` via the `$pullAll` patch operator. A confirmed gadget in `publicApiCheck()` causes this to bypass authorization on all piece-type REST API endpoints for every subsequent unauthenticated request, for the lifetime of the Node.js process. As of time of publication, no known patched versions are available."
    },
    {
      "lang": "es",
      "value": "ApostropheCMS es un sistema de gestión de contenido de código abierto basado en Node.js. En versiones hasta la 4.30.0 inclusive, ’apos.util.set()’ recorre rutas de notación de puntos sin sanear ’__proto__’, permitiendo a un editor autenticado escribir valores arbitrarios en ’Object.prototype’ a través del operador de parche ’$pullAll’. Un gadget confirmado en ’publicApiCheck()’ hace que esto omita la autorización en todos los endpoints de la API REST de tipo ’piece’ para cada solicitud no autenticada subsiguiente, durante la vida útil del proceso de Node.js. En el momento de la publicación, no hay versiones parcheadas conocidas disponibles."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "apostrophecms",
          "product": "apostrophe",
          "versions": [
            {
              "version": "<= 4.30.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 5.3
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-15T18:29:44.669655Z",
          "id": "CVE-2026-53609",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1321"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-6h5j-32cf-4253",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-6h5j-32cf-4253",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}