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CVE-2026-55215

Estado: Pendiente de análisisAlta (7.5)—

MariaDB Connector/Node.js is used to connect applications developed on Node.js to MariaDB and MySQL databases. Prior to versions 3.3.3, 3.4.6, and 3.5.3, when ssl is enabled without a pinned CA or server certificate, MariaDB Connector/Node.js sends credentials before completing certificate fingerprint validation. In lib/cmd/handshake/auth/handshake.js, a server that selects mysql_clear_password as the initial authentication plugin can receive the password before the post-TLS identity check.

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In lib/cmd/handshake/authentication.js, an authentication switch can evaluate the previous plugin instead of the requested target plugin, allowing mysql_clear_password to send the credential first. An active man-in-the-middle can present a self-signed certificate, capture the database password, and use it to authenticate directly even though the connector later rejects the server and closes the connection. This issue is fixed in versions 3.3.3, 3.4.6, and 3.5.3.

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.

Atacante MITM captura credenciales de BD antes de validar el certificado TLS (CWE-295). AV:N/AC:L/PR:N permite interceptar tráfico de red sin privilegios previos.

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

Network SegmentationLimit Access to Resource Over NetworkApplication Developer GuidanceUser TrainingUser Account ManagementThreat Intelligence Program

Tecnologías afectadas (1)

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

Mariadb — Connector Node.jsAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-55215",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-55215",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-09-01T01:56:07.557632Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "mariadb-corporation",
          "product": "mariadb-connector-nodejs",
          "versions": [
            {
              "status": "affected",
              "version": "< 3.2.4"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-08-28T20:18:26.353",
  "references": [
    {
      "url": "https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/514576a5a1fab3ea8498613e259a0b7a764e7302",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/c47d7275835c78c7eb8186cd23e9d57c045c128b",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/ecd36958e6e3bf0e0fa8389546f50c0ed6dbb2ac",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.3.3",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.4.6",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.5.3",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/mariadb-corporation/mariadb-connector-nodejs/security/advisories/GHSA-cqhc-2h57-wpxf",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://hackerone.com/reports/3777370",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://jira.mariadb.org/browse/CONJS-349",
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-295"
        },
        {
          "lang": "en",
          "value": "CWE-522"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "MariaDB Connector/Node.js is used to connect applications developed on Node.js to MariaDB and MySQL databases. Prior to versions 3.3.3, 3.4.6, and 3.5.3, when ssl is enabled without a pinned CA or server certificate, MariaDB Connector/Node.js sends credentials before completing certificate fingerprint validation. In lib/cmd/handshake/auth/handshake.js, a server that selects mysql_clear_password as the initial authentication plugin can receive the password before the post-TLS identity check. In lib/cmd/handshake/authentication.js, an authentication switch can evaluate the previous plugin instead of the requested target plugin, allowing mysql_clear_password to send the credential first. An active man-in-the-middle can present a self-signed certificate, capture the database password, and use it to authenticate directly even though the connector later rejects the server and closes the connection. This issue is fixed in versions 3.3.3, 3.4.6, and 3.5.3."
    }
  ],
  "lastModified": "2026-09-08T21:08:37.320",
  "sourceIdentifier": "security-advisories@github.com"
}