{
  "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-2026-111252",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-111252",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-10-15T18:56:18.803Z",
    "updatedAt": "2026-10-16T19:58:01.259Z",
    "importedAt": "2026-10-24T01:57:50.502Z",
    "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 denial of service via XML entity expansion",
      "summary": "A denial of service vulnerability exists in the XML parsing of multiple versions of OpenNMS Meridian and Horizon. OpenNMS parsed XML without an effective limit on entity expansion. A document with a DOCTYPE that declares internal entities can expand to a very large value and exhaust the server memory. An authenticated user with provisioning access can supply such a document through a requisition or foreign-source import, which includes a remote requisition URL that the server fetches and parses. Both deeply nested entities and a single large entity referenced many times cause the memory exhaustion. The fix caps the number of entity expansions for all XML parsing and rejects any DOCTYPE in requisition and foreign-source XML.\n\n\n\nThe solution is to upgrade to Meridian 2024.3.14, 2025.0.11, 2026.0.1 and Horizon 36.0.5 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": "2024.3.14"
            },
            {
              "version": "2025.0.0",
              "status": "affected",
              "versionType": "maven",
              "lessThan": "2025.0.11"
            },
            {
              "version": "2026.0.0",
              "status": "affected",
              "versionType": "maven",
              "lessThan": "2026.0.1"
            }
          ]
        },
        {
          "vendor": "The OpenNMS Group",
          "product": "Horizon",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "36.0.0",
              "status": "affected",
              "versionType": "maven",
              "lessThan": "36.0.5"
            }
          ]
        }
      ]
    }
  }
}