{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.9.4"
              },
              {
                "introduced": "5.0.0"
              },
              {
                "fixed": "5.4.4"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "introduced": "2ff182ba39ddea19fa1615bd3733f734b5e53842"
            },
            {
              "fixed": "274dca6df93de6eda649f27f5367ddbc8e0f1fe1"
            },
            {
              "fixed": "3f96d3b9ccda22f0d2f901b96376b5d08556ad75"
            },
            {
              "fixed": "1c7fee90e49153cf9ca4a6ec17481d25fbedc48d"
            },
            {
              "fixed": "3423f66c01dbc0455862e23ee699d2aa469f3234"
            },
            {
              "fixed": "66a3a14bf0892d320723ba766cd5f1d33a51d15b"
            },
            {
              "fixed": "ab992dc149610b90e337c2955ab6ccb7f72ffb3a"
            }
          ],
          "repo": "https://github.com/getkirby/kirby",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-whxw-24jc-cwmv"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-454"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54003.json"
  },
  "details": "Kirby is an open-source content management system. Prior to 4.9.4 and from 5.4.4, Kirby sites with no configured user accounts that run on publicly accessible servers behind a reverse proxy setting the Forwarded, X-Client-IP, or X-Real-IP request header could allow remote attackers to install the Panel and create the first admin user because local-IP checks trusted those headers incorrectly. This issue is fixed in versions 4.9.4 and 5.4.4.",
  "id": "CVE-2026-54003",
  "modified": "2026-07-15T01:49:06.025811399Z",
  "published": "2026-07-09T18:36:43.667Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/getkirby/kirby/releases/tag/4.9.4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/getkirby/kirby/releases/tag/5.4.4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54003.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/getkirby/kirby/security/advisories/GHSA-whxw-24jc-cwmv"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54003"
    },
    {
      "type": "FIX",
      "url": "https://github.com/getkirby/kirby/commit/1c7fee90e49153cf9ca4a6ec17481d25fbedc48d"
    },
    {
      "type": "FIX",
      "url": "https://github.com/getkirby/kirby/commit/3423f66c01dbc0455862e23ee699d2aa469f3234"
    },
    {
      "type": "FIX",
      "url": "https://github.com/getkirby/kirby/commit/66a3a14bf0892d320723ba766cd5f1d33a51d15b"
    },
    {
      "type": "FIX",
      "url": "https://github.com/getkirby/kirby/commit/ab992dc149610b90e337c2955ab6ccb7f72ffb3a"
    },
    {
      "type": "FIX",
      "url": "https://github.com/getkirby/kirby/pull/8166"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Kirby: External Initialization of the Panel on reverse proxy setups with the `Forwarded` header"
}