CVE-2026-49274: Kirby: `pages.access` permission is not checked in the pages picker for parent pages

Severity: medium (CVSS 5.3 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-09 · updated 2026-10-25
Weakness: CWE-862

Description

Kirby is an open-source content management system. Prior to 4.9.4 and 5.4.4, Kirby sites using the pages field with roles that have the pages.access permission disabled allowed authenticated users to provide an inaccessible parent page or site to the page picker backend and confirm arbitrary page existence and retrieve title field values. This issue is fixed in versions 4.9.4 and 5.4.4.

Affected products

getkirby kirby: before 4.9.4; from 5.0.0, < 5.4.4

References

https://github.com/getkirby/kirby/commit/1ae575da24e1b1cb8803a031d37eff14606d7c55
https://github.com/getkirby/kirby/commit/3bad37117adf2013548a784f820ddb2d8317333c
https://github.com/getkirby/kirby/commit/3f4398cdcf9f50f84fdac52ad78a7a85fb31589f
https://github.com/getkirby/kirby/commit/bffffce6c081f69c46163cc89b1fd18ccf2a18d1
https://github.com/getkirby/kirby/releases/tag/4.9.4
https://github.com/getkirby/kirby/releases/tag/5.4.4
https://github.com/getkirby/kirby/security/advisories/GHSA-23q2-54qv-rq5x

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