CVE-2026-54003

unknowncovered by 1 sourcefirst seen 2026-07-09

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.

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Exploitation outlook

Low exploitation risk0.55% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 42% of all EPSS-scored CVEs.

Advisory coverage (1)

unknownCVE-2026-54003: Kirby is an open-source content management system. Prior to 4.9.4 and from 5.4.4, Kirby sites …nvd · 2026-07-09

External references

NVD record for CVE-2026-54003

CVE.org record

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