{"id":"CVE-2026-54003","summary":"Kirby: External Initialization of the Panel on reverse proxy setups with the `Forwarded` header","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.","aliases":["GHSA-whxw-24jc-cwmv"],"modified":"2026-07-15T01:49:06.025811399Z","published":"2026-07-09T18:36:43.667Z","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"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/getkirby/kirby","events":[{"introduced":"0"},{"introduced":"2ff182ba39ddea19fa1615bd3733f734b5e53842"},{"fixed":"274dca6df93de6eda649f27f5367ddbc8e0f1fe1"},{"fixed":"3f96d3b9ccda22f0d2f901b96376b5d08556ad75"},{"fixed":"1c7fee90e49153cf9ca4a6ec17481d25fbedc48d"},{"fixed":"3423f66c01dbc0455862e23ee699d2aa469f3234"},{"fixed":"66a3a14bf0892d320723ba766cd5f1d33a51d15b"},{"fixed":"ab992dc149610b90e337c2955ab6ccb7f72ffb3a"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"4.9.4"},{"introduced":"5.0.0"},{"fixed":"5.4.4"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["5.4.3","5.4.2","4.9.2","5.4.1","4.9.1","5.4.0","4.9.0","4.8.0","5.3.3","5.3.2","5.3.1","5.3.0","5.2.3","5.2.2","5.2.1","5.2.0","5.1.4","5.1.3","5.1.2","5.1.1","5.1.0","5.0.4","5.0.3","5.0.2","5.0.1","5.0.0","4.7.2","4.7.1","4.7.0","4.6.1","4.6.0","4.5.0","4.4.1","4.4.0","4.3.1","4.3.0","4.2.0","4.1.2","4.1.1","4.1.0","3.9.8","4.0.3","4.0.2","4.0.1","4.0.0","3.9.7","3.9.6.1","3.9.6","3.8.4","3.9.6-rc.1","3.9.5","3.9.4","3.9.3","3.9.2","3.9.1","3.9.0","3.8.3","3.8.2","3.8.1.1","3.8.1","3.8.0","3.7.5","3.7.4","3.7.3","3.6.6","3.7.4-rc.1","3.5.7.1","3.7.2.1","3.7.2","3.7.1","3.7.0.2","3.7.0.1","3.7.0","3.6.5","3.6.4","3.6.3.1","3.6.3","3.6.2","3.6.2-rc.3","3.6.2-rc.2","3.6.2-rc.1","3.6.1.1","3.6.0","3.5.7","3.5.6","3.5.5","3.5.4","3.5.3.1","3.5.3","3.5.2","3.5.1","3.5.1-rc.1","3.5.0","3.5.0-rc.7","3.5.0-rc.6","3.5.0-rc.5","3.5.0-rc.4","3.5.0-rc.3","3.5.0-rc.2","3.5.0-rc.1","3.4.2","3.4.1","3.4.0","3.3.6","3.3.5","3.3.4","3.3.3","3.3.2","3.3.1","3.3.0","3.2.5","3.2.5-rc.2","3.2.5-rc.1","3.2.3-rc.1","3.2.2","3.2.1","3.2.1-rc.1","3.2.0","3.2.0-rc.4","3.2.0-rc.3","3.2.0-rc.2","3.2.0-rc.1","3.1.4","3.1.4-rc.1","3.1.3","3.1.3-rc.1","3.1.2","3.1.2-rc.1","3.1.1","3.1.0","3.1.0-rc.1","3.0.3","3.0.3-rc.3","3.0.3-rc.2","3.0.3-rc.1","3.0.2","3.0.2-rc.1","3.0.1","3.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54003.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","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"}]}