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CVE-2026-32128

Estado: AnalizadaMedia (6.3)—

FastGPT is an AI Agent building platform. In 4.14.7 and earlier, FastGPT's Python Sandbox (fastgpt-sandbox) includes guardrails intended to prevent file writes (static detection + seccomp). These guardrails are bypassable by remapping stdout (fd 1) to an arbitrary writable file descriptor using fcntl. After remapping, writing via sys.stdout.write() still satisfies the seccomp rule write(fd==1), enabling arbitrary file creation/overwrite inside the sandbox container despite the intended no file writes restriction.

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)

Fastgpt — Fastgpt

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-32128",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-32128",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-03-12T15:31:49.185736Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 3.4,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "labring",
          "product": "FastGPT",
          "versions": [
            {
              "status": "affected",
              "version": "<= 4.14.7"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-03-11T22:16:32.633",
  "references": [
    {
      "url": "https://github.com/labring/FastGPT/security/advisories/GHSA-6hw6-mxrm-v6wj",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-184"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "FastGPT is an AI Agent building platform. In 4.14.7 and earlier, FastGPT's Python Sandbox (fastgpt-sandbox) includes guardrails intended to prevent file writes (static detection + seccomp). These guardrails are bypassable by remapping stdout (fd 1) to an arbitrary writable file descriptor using fcntl. After remapping, writing via sys.stdout.write() still satisfies the seccomp rule write(fd==1), enabling arbitrary file creation/overwrite inside the sandbox container despite the intended no file writes restriction."
    },
    {
      "lang": "es",
      "value": "FastGPT es una plataforma de creación de agentes de IA. En 4.14.7 y versiones anteriores, el sandbox de Python de FastGPT (fastgpt-sandbox) incluye barreras de seguridad destinadas a prevenir escrituras de archivos (detección estática + seccomp). Estas barreras de seguridad son eludibles reasignando stdout (fd 1) a un descriptor de archivo arbitrario con permisos de escritura usando fcntl. Después de la reasignación, la escritura a través de sys.stdout.write() aún satisface la regla de seccomp write(fd==1), lo que permite la creación/sobrescritura arbitraria de archivos dentro del contenedor del sandbox a pesar de la restricción intencionada de no escritura de archivos."
    }
  ],
  "lastModified": "2026-06-17T10:35:11.160",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:fastgpt:fastgpt:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EE37BFC6-6051-4C66-AED8-9F7F80DC3EE6",
              "versionEndIncluding": "4.14.7"
            }
          ],
          "operator": "OR"
        }
      ]
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  ],
  "sourceIdentifier": "security-advisories@github.com"
}