{
  "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-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48550.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 reflected cross-site scripting in cmd.cgi via the NagFormId parameter. An unauthenticated remote attacker can craft a malicious link that, when followed by an authenticated user, executes arbitrary JavaScript in the victim's browser.",
  "id": "CVE-2026-48550",
  "modified": "2026-08-14T03:51:30.192234908Z",
  "published": "2026-08-12T16:30:02.409Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48550.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/NagiosEnterprises/nagioscore/blob/master/Changelog"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-48550"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/nagios-core-xi-cmd-cgi-reflected-xss-via-nagformid-parameter"
    },
    {
      "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:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Nagios Core / XI cmd.cgi Reflected XSS via NagFormId Parameter"
}