{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-19596",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-19596",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-10T20:08:50.816Z",
    "updatedAt": "2026-09-10T20:27:45.533Z",
    "importedAt": "2026-10-24T01:57:55.771Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "OpenNMS XML collector XXE allows arbitrary file read from the OpenNMS host",
      "summary": "An XML External Entity (XXE) vulnerability exists in the XML collector of multiple versions of OpenNMS Meridian and Horizon. When OpenNMS collects XML from a source whose response is attacker-controlled (for example a compromised monitored host or an HTTP man-in-the-middle position), the collector's XML parser resolves external entities and external DTDs. This allows an attacker to read files accessible to the OpenNMS service account, including database credentials, and to induce out-of-band requests.\n\n\n\nThe solution is to upgrade to Meridian 2024.3.13, 2025.0.10 and Horizon 36.0.4 or newer. Meridian and Horizon installation instructions state that they are intended for installation within an organization's private networks and should not be directly accessible from the Internet.",
      "affected": [
        {
          "vendor": "The OpenNMS Group",
          "product": "Meridian",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2024.1.0",
              "status": "affected",
              "versionType": "maven",
              "lessThan": "2024.3.13"
            },
            {
              "version": "2025.0.0",
              "status": "affected",
              "versionType": "maven",
              "lessThan": "2025.0.10"
            }
          ]
        },
        {
          "vendor": "The OpenNMS Group",
          "product": "Horizon",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "36.0.0",
              "status": "affected",
              "versionType": "maven",
              "lessThan": "36.0.4"
            }
          ]
        }
      ]
    }
  }
}