{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54003","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-11T16:34:11.635Z","datePublished":"2026-07-09T18:36:43.667Z","dateUpdated":"2026-07-09T19:23:24.078Z"},"containers":{"cna":{"title":"Kirby: External Initialization of the Panel on reverse proxy setups with the `Forwarded` header","problemTypes":[{"descriptions":[{"cweId":"CWE-454","lang":"en","description":"CWE-454: External Initialization of Trusted Variables or Data Stores","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":9.1,"baseSeverity":"CRITICAL","vectorString":"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","version":"4.0"}}],"references":[{"name":"https://github.com/getkirby/kirby/security/advisories/GHSA-whxw-24jc-cwmv","tags":["x_refsource_CONFIRM"],"url":"https://github.com/getkirby/kirby/security/advisories/GHSA-whxw-24jc-cwmv"},{"name":"https://github.com/getkirby/kirby/pull/8166","tags":["x_refsource_MISC"],"url":"https://github.com/getkirby/kirby/pull/8166"},{"name":"https://github.com/getkirby/kirby/commit/1c7fee90e49153cf9ca4a6ec17481d25fbedc48d","tags":["x_refsource_MISC"],"url":"https://github.com/getkirby/kirby/commit/1c7fee90e49153cf9ca4a6ec17481d25fbedc48d"},{"name":"https://github.com/getkirby/kirby/commit/3423f66c01dbc0455862e23ee699d2aa469f3234","tags":["x_refsource_MISC"],"url":"https://github.com/getkirby/kirby/commit/3423f66c01dbc0455862e23ee699d2aa469f3234"},{"name":"https://github.com/getkirby/kirby/commit/66a3a14bf0892d320723ba766cd5f1d33a51d15b","tags":["x_refsource_MISC"],"url":"https://github.com/getkirby/kirby/commit/66a3a14bf0892d320723ba766cd5f1d33a51d15b"},{"name":"https://github.com/getkirby/kirby/commit/ab992dc149610b90e337c2955ab6ccb7f72ffb3a","tags":["x_refsource_MISC"],"url":"https://github.com/getkirby/kirby/commit/ab992dc149610b90e337c2955ab6ccb7f72ffb3a"},{"name":"https://github.com/getkirby/kirby/releases/tag/4.9.4","tags":["x_refsource_MISC"],"url":"https://github.com/getkirby/kirby/releases/tag/4.9.4"},{"name":"https://github.com/getkirby/kirby/releases/tag/5.4.4","tags":["x_refsource_MISC"],"url":"https://github.com/getkirby/kirby/releases/tag/5.4.4"}],"affected":[{"vendor":"getkirby","product":"kirby","versions":[{"version":"< 4.9.4","status":"affected"},{"version":">= 5.0.0, < 5.4.4","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-09T18:36:43.667Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-whxw-24jc-cwmv","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-09T19:23:16.615569Z","id":"CVE-2026-54003","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-09T19:23:24.078Z"}}]}}