{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.5.14"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "cfa5684eb50facc3183d5ddb01d853b9eb9cc218"
            }
          ],
          "repo": "https://github.com/nagiosenterprises/nagioscore",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-78"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48554.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "2026R1.7"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to authenticated remote code execution via unfiltered NOTIFICATION-family macro substitution through the com_data parameter. When a notification command references $NOTIFICATIONCOMMENT$ or $NOTIFICATIONAUTHOR$ in a shell-reachable position, authenticated UI users can run arbitrary commands as the nagios user. Exploitation requires a non-default configuration in which a notification command references these macros in a shell-executed command line.",
  "id": "CVE-2026-48554",
  "modified": "2026-08-15T04:07:07.978424096Z",
  "published": "2026-08-12T16:48:27.872Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48554.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/NagiosEnterprises/nagioscore/blob/master/Changelog"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48554"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/nagios-core-xi-authenticated-rce-via-unfiltered-notification-family-macro-substitution"
    },
    {
      "type": "FIX",
      "url": "https://www.nagios.com/security-disclosures/nagios-core/"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Nagios Core / XI Authenticated RCE via Unfiltered NOTIFICATION-Family Macro Substitution"
}