CVE-2026-53666

{
  "id": "CVE-2026-53666",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-27T22:17:30.937",
  "lastModified": "2026-10-24T13:10:00.147",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "React Router is a router for React. In versions 6.4.0 through 7.17.0, if application code was written in a way that allows attacker-supplied input to overwrite certain aspects of errors caught by the SSR process, then it was possible for an attacker to trigger unexpected constructor execution on the client, which would in turn trigger an outbound network request. This is only possible with very specific (and unlikely) application-layer code. Note that this does not impact an application if it is using Declarative Mode. It only impacts Framework Mode and Data Mode applications that perform manual SSR/hydration. This issue has been fixed in version 7.18.0."
    },
    {
      "lang": "es",
      "value": "React Router es un router para React. En las versiones 6.4.0 a 7.17.0, si el código de la aplicación fue escrito de una manera que permite que la entrada suministrada por el atacante sobrescriba ciertos aspectos de errores capturados por el proceso SSR, entonces era posible para un atacante desencadenar la ejecución inesperada del constructor en el cliente, lo que a su vez desencadenaría una solicitud de red saliente. Esto solo es posible con código de capa de aplicación muy específico (e improbable). Tenga en cuenta que esto no impacta una aplicación si está utilizando el Modo Declarativo. Solo impacta las aplicaciones de Modo Framework y Modo de Datos que realizan SSR/hidratación manual. Este problema ha sido solucionado en la versión 7.18.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "remix-run",
          "product": "react-router",
          "versions": [
            {
              "version": ">= 6.4.0, < 7.18.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.7
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-28T15:09:52.899776Z",
          "id": "CVE-2026-53666",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-470"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:shopify:react-router:*:*:*:*:*:node.js:*:*",
              "versionStartIncluding": "6.4.0",
              "versionEndExcluding": "7.18.0",
              "matchCriteriaId": "421A46B7-8B73-4B04-89EE-F1F953384617"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180",
      "source": "[email protected]",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/remix-run/react-router/commit/9d22943fd46c8ae4b08236425fa3549e10e9ad1a",
      "source": "[email protected]",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://github.com/remix-run/react-router/pull/15175",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://github.com/remix-run/react-router/releases/tag/[email protected]",
      "source": "[email protected]",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/remix-run/react-router/security/advisories/GHSA-337j-9hxr-rhxg",
      "source": "[email protected]",
      "tags": [
        "Third Party Advisory"
      ]
    }
  ]
}