{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0.1.0"
                  },
                  {
                    "fixed": "0.2.6"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              },
              {
                "range": [
                  {
                    "fixed": "afff1d61b31790f8c27e6c577bb7703eb1883ddd"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              }
            ]
          },
          "events": [
            {
              "introduced": "3a823826032167c73efe88ac8ed080ced20a8e71"
            },
            {
              "fixed": "afff1d61b31790f8c27e6c577bb7703eb1883ddd"
            }
          ],
          "repo": "https://github.com/h5io/h5io",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-vwvw-f6v4-w737"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-502",
      "CWE-95"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/120xxx/CVE-2026-120499.json"
  },
  "details": "h5io before 0.2.6 contains a code injection vulnerability in read_hdf5() that allows attackers to execute arbitrary code by supplying a crafted HDF5 file. Attackers can store Python code in a node titled timezone, which _triage_read() passes to eval() with builtins reachable, name an arbitrary module in class or custom-object nodes that _import_class() imports, or place pickled objects in pd_dataframe or pd_series nodes that pandas deserializes on read.",
  "id": "CVE-2026-120499",
  "modified": "2026-11-06T10:30:35.066476648Z",
  "published": "2026-11-05T16:55:32.599Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/120xxx/CVE-2026-120499.json"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/h5io/h5io"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/h5io/h5io/blob/h5io-0.2.5/h5io/_h5io.py#L601-L604"
    },
    {
      "type": "FIX",
      "url": "https://github.com/h5io/h5io/commit/afff1d61b31790f8c27e6c577bb7703eb1883ddd"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/h5io/h5io/releases/tag/h5io-0.2.6"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/h5io/h5io/security/advisories/GHSA-vwvw-f6v4-w737"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-120499"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/h5io-before-0.2.6-arbitrary-code-execution-via-read-hdf5"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "h5io before 0.2.6 Arbitrary Code Execution via read_hdf5"
}