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CVE-2026-32625

Estado: AnalizadaCrítica (9.6)—

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. In versions up to and including 0.8.3, the Model Context Protocol (MCP) server integration resolves ${VAR} placeholders against the server's process.env during Zod schema validation of user-supplied MCP server URLs.

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Any authenticated user can create a malicious MCP server configuration with a URL pointing to an attacker-controlled domain containing environment variable references, causing the LibreChat server to connect to the attacker's server and transmit critical secrets such as CREDS_KEY, CREDS_IV, JWT_SECRET, and MONGO_URI in the request URL. This enables full compromise of the installation's cryptographic materials and database credentials without requiring administrative privileges. This is patched in version 0.8.4-rc1.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Acceso remoto autenticado a servicio interno (MCP) que filtra secretos del servidor (CREDS_KEY, CREDS_IV, JWT_SECRET, MONGO_URI) mediante validación de URL. PR:L y red remota dictan T1210; los impactos son lectura de datos sensibles y credenciales de cuentas.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability ScanningUser TrainingThreat Intelligence ProgramRestrict File and Directory PermissionsPrivileged Account ManagementPassword Policies

Tecnologías afectadas (1)

Librechat — Librechat

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-32625",
  "cveTags": [],
  "metrics": {
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      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "id": "CVE-2026-32625",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-06-03T13:28:03.174610Z"
        }
      }
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    "cvssMetricV31": [
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
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  ],
  "published": "2026-06-02T23:16:35.947",
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      "value": "LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. In versions up to and including 0.8.3, the Model Context Protocol (MCP) server integration resolves ${VAR} placeholders against the server's process.env during Zod schema validation of user-supplied MCP server URLs. Any authenticated user can create a malicious MCP server configuration with a URL pointing to an attacker-controlled domain containing environment variable references, causing the LibreChat server to connect to the attacker's server and transmit critical secrets such as CREDS_KEY, CREDS_IV, JWT_SECRET, and MONGO_URI in the request URL. This enables full compromise of the installation's cryptographic materials and database credentials without requiring administrative privileges. This is patched in version 0.8.4-rc1."
    },
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      "lang": "es",
      "value": "LibreChat es un clon mejorado de ChatGPT que soporta múltiples proveedores de IA. En versiones hasta la 0.8.3 inclusive, la integración del servidor del Protocolo de Contexto del Modelo (MCP) resuelve los marcadores de posición ${VAR} contra el process.env del servidor durante la validación del esquema Zod de las URL de servidor MCP proporcionadas por el usuario. Cualquier usuario autenticado puede crear una configuración de servidor MCP maliciosa con una URL que apunte a un dominio controlado por un atacante que contenga referencias a variables de entorno, lo que hace que el servidor de LibreChat se conecte al servidor del atacante y transmita secretos críticos como CREDS_KEY, CREDS_IV, JWT_SECRET y MONGO_URI en la URL de la solicitud. Esto permite el compromiso total de los materiales criptográficos de la instalación y las credenciales de la base de datos sin requerir privilegios administrativos. Esto está parcheado en la versión 0.8.4-rc1."
    }
  ],
  "lastModified": "2026-07-22T19:10:00.120",
  "configurations": [
    {
      "nodes": [
        {
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