CVE-2026-3960

{
  "id": "CVE-2026-3960",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-23T10:16:17.813",
  "lastModified": "2026-10-26T22:10:00.163",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A critical remote code execution vulnerability exists in the unauthenticated REST API endpoint /99/ImportSQLTable in H2O-3 version 3.46.0.9 and prior. The vulnerability arises due to insufficient security controls in the parameter blacklist mechanism, which only targets MySQL JDBC driver-specific dangerous parameters. An attacker can bypass these controls by switching the JDBC URL protocol to jdbc:postgresql: and exploiting PostgreSQL JDBC driver-specific parameters such as socketFactory and socketFactoryArg. This allows unauthenticated attackers to execute arbitrary code on the H2O-3 server with the privileges of the H2O-3 process. The issue is resolved in version 3.46.0.10."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad crítica de ejecución remota de código existe en el endpoint de API REST no autenticado /99/ImportSQLTable en H2O-3 versión 3.46.0.9 y anteriores. La vulnerabilidad surge debido a controles de seguridad insuficientes en el mecanismo de lista negra de parámetros, que solo apunta a parámetros peligrosos específicos del controlador JDBC de MySQL. Un atacante puede eludir estos controles cambiando el protocolo de la URL JDBC a jdbc:postgresql: y explotando parámetros específicos del controlador JDBC de PostgreSQL como socketFactory y socketFactoryArg. Esto permite a atacantes no autenticados ejecutar código arbitrario en el servidor H2O-3 con los privilegios del proceso H2O-3. El problema se resuelve en la versión 3.46.0.10."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "h2oai",
          "product": "h2oai/h2o-3",
          "versions": [
            {
              "version": "unspecified",
              "lessThan": "3.46.0.10",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
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        "source": "[email protected]",
        "type": "Primary",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
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        "exploitabilityScore": 3.9,
        "impactScore": 5.9
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        "source": "[email protected]",
        "type": "Secondary",
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          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-23T12:25:29.022861Z",
          "id": "CVE-2026-3960",
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          "role": "CISA Coordinator",
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  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
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  "references": [
    {
      "url": "https://github.com/h2oai/h2o-3/commit/b9ae2d3c5220db2dc53753357a783e590364d044",
      "source": "[email protected]",
      "tags": [
        "Patch"
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    {
      "url": "https://huntr.com/bounties/6954fe04-b905-453f-8c53-205ac8377e0d",
      "source": "[email protected]",
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}