CVE-2026-42353

{
  "id": "CVE-2026-42353",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-08T16:16:12.197",
  "lastModified": "2026-10-26T18:10:00.173",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "i18next-http-middleware is a middleware to be used with Node.js web frameworks like express or Fastify and also for Deno. Prior to version 3.9.3, i18next-http-middleware passes the user-controlled lng and ns values from getResourcesHandler directly into i18next.services.backendConnector.load(languages, namespaces, …) without any sanitization. Depending on which backend is configured, the unvalidated path segments enable either path traversal or SSRF. This issue has been patched in version 3.9.3."
    },
    {
      "lang": "es",
      "value": "i18next-http-middleware es un middleware para usar con frameworks web de Node.js como express o Fastify y también para Deno. Antes de la versión 3.9.3, i18next-http-middleware pasa los valores lng y ns controlados por el usuario de getResourcesHandler directamente a i18next.services.backendConnector.load(languages, namespaces, ...) sin ninguna sanitización. Dependiendo de qué backend esté configurado, los segmentos de ruta no validados permiten ya sea salto de ruta o SSRF. Este problema ha sido parcheado en la versión 3.9.3."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "i18next",
          "product": "i18next-http-middleware",
          "versions": [
            {
              "version": "< 3.9.3",
              "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:H/I:L/A:N",
          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-08T23:29:51.253615Z",
          "id": "CVE-2026-42353",
          "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-22"
        },
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/i18next/i18next-http-middleware/security/advisories/GHSA-jfgf-83c5-2c4m",
      "source": "[email protected]"
    }
  ]
}