CVE-2026-55641

{
  "id": "CVE-2026-55641",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-10T17:16:59.330",
  "lastModified": "2026-10-25T15:10:00.147",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "9Router is an AI router & token saver. Prior to 0.5.2, 9router determines whether a /v1 LLM proxy request is local by reading the client-controlled Host header, allowing a remote unauthenticated attacker to send Host: localhost and bypass API-key authentication. In the default configuration, this exposes the /v1 proxy to upstream provider calls using stored provider credentials and allows /v1/search with the searxng provider_options.baseUrl parameter to drive server-side requests to internal or cloud-metadata hosts. This issue is fixed in version 0.5.2."
    },
    {
      "lang": "es",
      "value": "9Router es un router de IA y ahorrador de tokens. Antes de la versión 0.5.2, 9router determina si una solicitud de proxy LLM /v1 es local leyendo el encabezado Host controlado por el cliente, permitiendo a un atacante remoto no autenticado enviar Host: localhost y omitir la autenticación por clave de API. En la configuración predeterminada, esto expone el proxy /v1 a llamadas de proveedores ascendentes utilizando credenciales de proveedor almacenadas y permite /v1/search con el parámetro searxng provider_options.baseUrl para dirigir solicitudes del lado del servidor a hosts internos o de metadatos en la nube. Este problema está solucionado en la versión 0.5.2."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "decolua",
          "product": "9router",
          "versions": [
            {
              "version": "< 0.5.2",
              "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": "2026-07-10T19:06:04.625545Z",
          "id": "CVE-2026-55641",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-290"
        },
        {
          "lang": "en",
          "value": "CWE-348"
        },
        {
          "lang": "en",
          "value": "CWE-918"
        },
        {
          "lang": "en",
          "value": "CWE-1327"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/decolua/9router/commit/b282f0554972ea35281520738759d76abcd0b0b3",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/decolua/9router/releases/tag/v0.5.2",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/decolua/9router/security/advisories/GHSA-86m2-fcxq-5q7c",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/decolua/9router/security/advisories/GHSA-86m2-fcxq-5q7c",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}