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CVE-2026-54003

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:86365cb52c3a1e3c1a58b60bd5aa00ff7af24b568f80ae321494c57c258e964a
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"kirby","vendor":"getkirby","versions":[{"status":"affected","version":"< 4.9.4"},{"status":"affected","version":">= 5.0.0, < 5.4.4"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fcb8a4ddaf1f808970cb3894612e0e66fe0657dab699e30014b9cf0f12992f05 · sha256:8775d7ed3f9ce263… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":9.1,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","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","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:fcb8a4ddaf1f808970cb3894612e0e66fe0657dab699e30014b9cf0f12992f05 · sha256:8775d7ed3f9ce263… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-454","description":"CWE-454: External Initialization of Trusted Variables or Data Stores","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:fcb8a4ddaf1f808970cb3894612e0e66fe0657dab699e30014b9cf0f12992f05 · sha256:8775d7ed3f9ce263… · /containers/cna/problemTypes/0/descriptions/0

Source references

8 source assertions
{"name":"https://github.com/getkirby/kirby/commit/1c7fee90e49153cf9ca4a6ec17481d25fbedc48d","tags":["x_refsource_MISC"],"url":"https://github.com/getkirby/kirby/commit/1c7fee90e49153cf9ca4a6ec17481d25fbedc48d"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fcb8a4ddaf1f808970cb3894612e0e66fe0657dab699e30014b9cf0f12992f05 · sha256:8775d7ed3f9ce263… · /containers/cna/references/2
{"name":"https://github.com/getkirby/kirby/commit/3423f66c01dbc0455862e23ee699d2aa469f3234","tags":["x_refsource_MISC"],"url":"https://github.com/getkirby/kirby/commit/3423f66c01dbc0455862e23ee699d2aa469f3234"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fcb8a4ddaf1f808970cb3894612e0e66fe0657dab699e30014b9cf0f12992f05 · sha256:8775d7ed3f9ce263… · /containers/cna/references/3
{"name":"https://github.com/getkirby/kirby/commit/66a3a14bf0892d320723ba766cd5f1d33a51d15b","tags":["x_refsource_MISC"],"url":"https://github.com/getkirby/kirby/commit/66a3a14bf0892d320723ba766cd5f1d33a51d15b"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fcb8a4ddaf1f808970cb3894612e0e66fe0657dab699e30014b9cf0f12992f05 · sha256:8775d7ed3f9ce263… · /containers/cna/references/4
{"name":"https://github.com/getkirby/kirby/commit/ab992dc149610b90e337c2955ab6ccb7f72ffb3a","tags":["x_refsource_MISC"],"url":"https://github.com/getkirby/kirby/commit/ab992dc149610b90e337c2955ab6ccb7f72ffb3a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fcb8a4ddaf1f808970cb3894612e0e66fe0657dab699e30014b9cf0f12992f05 · sha256:8775d7ed3f9ce263… · /containers/cna/references/5
{"name":"https://github.com/getkirby/kirby/pull/8166","tags":["x_refsource_MISC"],"url":"https://github.com/getkirby/kirby/pull/8166"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fcb8a4ddaf1f808970cb3894612e0e66fe0657dab699e30014b9cf0f12992f05 · sha256:8775d7ed3f9ce263… · /containers/cna/references/1
{"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"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fcb8a4ddaf1f808970cb3894612e0e66fe0657dab699e30014b9cf0f12992f05 · sha256:8775d7ed3f9ce263… · /containers/cna/references/6
{"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"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fcb8a4ddaf1f808970cb3894612e0e66fe0657dab699e30014b9cf0f12992f05 · sha256:8775d7ed3f9ce263… · /containers/cna/references/7
{"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"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fcb8a4ddaf1f808970cb3894612e0e66fe0657dab699e30014b9cf0f12992f05 · sha256:8775d7ed3f9ce263… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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