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CVE-2026-42344

Estado: AplazadaMedia (6.3)—

FastGPT is an AI Agent building platform. In versions 4.14.11 and prior, FastGPT's isInternalAddress() function in packages/service/common/system/utils.ts is vulnerable to DNS rebinding (TOCTOU — Time-of-Check to Time-of-Use). The function resolves the hostname via dns.resolve4()/dns.resolve6() and checks resolved IPs against private ranges, but the actual HTTP request happens in a separate call with a new DNS resolution, allowing the DNS record to change between validation and fetch. At time of publication, there are no publicly available patches.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Fastgpt — FastgptAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-42344",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-42344",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-11T18:03:09.390132Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 6.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 4,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "labring",
          "product": "FastGPT",
          "versions": [
            {
              "status": "affected",
              "version": "<= 4.14.11"
            }
          ]
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  ],
  "published": "2026-05-08T23:16:37.177",
  "references": [
    {
      "url": "https://github.com/labring/FastGPT/security/advisories/GHSA-cc8x-jrqv-hmwh",
      "source": "security-advisories@github.com"
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      "source": "security-advisories@github.com",
      "description": [
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      "lang": "en",
      "value": "FastGPT is an AI Agent building platform. In versions 4.14.11 and prior, FastGPT's isInternalAddress() function in packages/service/common/system/utils.ts is vulnerable to DNS rebinding (TOCTOU — Time-of-Check to Time-of-Use). The function resolves the hostname via dns.resolve4()/dns.resolve6() and checks resolved IPs against private ranges, but the actual HTTP request happens in a separate call with a new DNS resolution, allowing the DNS record to change between validation and fetch. At time of publication, there are no publicly available patches."
    },
    {
      "lang": "es",
      "value": "FastGPT es una plataforma de creación de agentes de IA. En las versiones 4.14.11 y anteriores, la función isInternalAddress() de FastGPT en packages/service/common/system/utils.ts es vulnerable a la reencuadernación de DNS (TOCTOU - Tiempo de verificación a tiempo de uso). La función resuelve el nombre de host a través de dns.resolve4()/dns.resolve6() y verifica las IP resueltas contra rangos privados, pero la solicitud HTTP real ocurre en una llamada separada con una nueva resolución de DNS, lo que permite que el registro DNS cambie entre la validación y la recuperación. En el momento de la publicación, no hay parches disponibles públicamente."
    }
  ],
  "lastModified": "2026-07-24T21:10:00.143",
  "sourceIdentifier": "security-advisories@github.com"
}