PYSEC-2026-1436

Vulnerability from pysec - Published: 2026-07-07 14:34 - Updated: 2026-07-07 17:24
VLAI
Details

In h2oai/h2o-3 version 3.46.0, the endpoint for exporting models does not restrict the export location, allowing an attacker to export a model to any file in the server's file structure, thereby overwriting it. This vulnerability can be exploited to overwrite any file on the target server with a trained model file, although the content of the overwrite is not controllable by the attacker.

Severity
7.1 (High)
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
Impacted products
Name purl
h2o pkg:pypi/h2o
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "h2o",
        "purl": "pkg:pypi/h2o"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.32.1.1"
            },
            {
              "last_affected": "3.46.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.32.1.1",
        "3.32.1.2",
        "3.32.1.3",
        "3.32.1.4",
        "3.32.1.5",
        "3.32.1.6",
        "3.32.1.7",
        "3.34.0.3",
        "3.34.0.7",
        "3.34.0.8",
        "3.36.0.2",
        "3.36.0.3",
        "3.36.0.4",
        "3.36.1.1",
        "3.36.1.2",
        "3.36.1.3",
        "3.36.1.4",
        "3.36.1.5",
        "3.38.0.1",
        "3.38.0.2",
        "3.38.0.3",
        "3.38.0.4",
        "3.40.0.1",
        "3.40.0.2",
        "3.40.0.3",
        "3.40.0.4",
        "3.42.0.1",
        "3.42.0.2",
        "3.42.0.3",
        "3.42.0.4",
        "3.44.0.1",
        "3.44.0.2",
        "3.44.0.3"
      ]
    }
  ],
  "aliases": [
    "CVE-2024-6854",
    "GHSA-47f6-5p7h-5f3h"
  ],
  "details": "In h2oai/h2o-3 version 3.46.0, the endpoint for exporting models does not restrict the export location, allowing an attacker to export a model to any file in the server\u0027s file structure, thereby overwriting it. This vulnerability can be exploited to overwrite any file on the target server with a trained model file, although the content of the overwrite is not controllable by the attacker.",
  "id": "PYSEC-2026-1436",
  "modified": "2026-07-07T17:24:17.333514Z",
  "published": "2026-07-07T14:34:54.751354Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-6854"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/h2oai/h2o-3"
    },
    {
      "type": "WEB",
      "url": "https://github.com/h2oai/h2o-3/blob/a20b5b19b769866ee24b217ee78b820e64c1cd6a/h2o-core/src/main/java/hex/Model.java#L3366"
    },
    {
      "type": "WEB",
      "url": "https://huntr.com/bounties/97d013f9-ac51-4c80-8dd7-8dfde11f33b2"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/h2o"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-47f6-5p7h-5f3h"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "H2O Vulnerable to Arbitrary File Overwrite via File Export"
}



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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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