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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "resdata"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.2.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-55209"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-120",
      "CWE-125",
      "CWE-129",
      "CWE-476"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-18T20:11:04Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
  },
  "details": "### Impact\nPrior to version 6.2.9 resdata would not correctly validate input in GRDECL files. The severity rating assumes that resdata is used to parse untrused files in a networking context such as a webservice.\n\n### Patches\nThe bug has been patched starting with version 6.2.9.",
  "id": "GHSA-pr85-w493-9w3x",
  "modified": "2026-08-18T20:11:04Z",
  "published": "2026-08-18T20:11:04Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/equinor/resdata/security/advisories/GHSA-pr85-w493-9w3x"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/equinor/resdata"
    },
    {
      "type": "WEB",
      "url": "https://github.com/equinor/resdata/releases/tag/6.2.9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "resdata has Classic Buffer Overflow, Improper Validation of Array Index, NULL Pointer Dereference and Out-of-bounds Read"
}

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "resdata",
        "purl": "pkg:pypi/resdata"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.2.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.0.1",
        "4.0.0",
        "4.1.0",
        "4.1.1",
        "4.1.2",
        "4.2.0",
        "4.2.1",
        "4.2.2",
        "4.2.3",
        "4.2.4",
        "5.0.0",
        "5.0.0b0",
        "5.0.1",
        "5.0.2",
        "5.0.3",
        "5.1.0",
        "5.1.1",
        "5.1.2",
        "5.1.3",
        "6.0.1",
        "6.1.0",
        "6.2.0",
        "6.2.2",
        "6.2.3",
        "6.2.4",
        "6.2.5",
        "6.2.6",
        "6.2.7",
        "6.2.8"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-55209",
    "GHSA-pr85-w493-9w3x"
  ],
  "details": "### Impact\nPrior to version 6.2.9 resdata would not correctly validate input in GRDECL files. The severity rating assumes that resdata is used to parse untrused files in a networking context such as a webservice.\n\n### Patches\nThe bug has been patched starting with version 6.2.9.",
  "id": "PYSEC-2026-3694",
  "modified": "2026-08-19T12:16:38.889157Z",
  "published": "2026-08-19T11:56:27.903833Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/equinor/resdata/security/advisories/GHSA-pr85-w493-9w3x"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/equinor/resdata"
    },
    {
      "type": "WEB",
      "url": "https://github.com/equinor/resdata/releases/tag/6.2.9"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/resdata"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-pr85-w493-9w3x"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55209"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "resdata has Classic Buffer Overflow, Improper Validation of Array Index, NULL Pointer Dereference and Out-of-bounds Read"
}