CVE-2026-54003
Kirby: External Initialization of the Panel on reverse proxy setups with the `Forwarded` header
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-454 |
| Vendor | getkirby |
| Product | kirby |
| Published | Jul 9, 2026 |
| Last Updated | Jul 9, 2026 |
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Affected Versions
getkirby / kirby
< 4.9.4 >= 5.0.0, < 5.4.4
References
github.com: https://github.com/getkirby/kirby/security/advisories/GHSA-whxw-24jc-cwmv github.com: https://github.com/getkirby/kirby/pull/8166 github.com: https://github.com/getkirby/kirby/commit/1c7fee90e49153cf9ca4a6ec17481d25fbedc48d github.com: https://github.com/getkirby/kirby/commit/3423f66c01dbc0455862e23ee699d2aa469f3234 github.com: https://github.com/getkirby/kirby/commit/66a3a14bf0892d320723ba766cd5f1d33a51d15b github.com: https://github.com/getkirby/kirby/commit/ab992dc149610b90e337c2955ab6ccb7f72ffb3a github.com: https://github.com/getkirby/kirby/releases/tag/4.9.4 github.com: https://github.com/getkirby/kirby/releases/tag/5.4.4