PT-2026-34818 · Kirby · Kirby

Offset · Published 2026-04-24 · Updated 2026-04-29 · CVE-2026-41325

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Kirby versions prior to 4.9.0 Kirby versions prior to 5.4.0

Description Kirby is an open-source content management system where user permissions and model blueprint options control authorization for actions such as pages.create, files.create, and users.create. A flaw allowed the override of these permissions during the creation of pages, files, and users by injecting custom dynamic blueprint configuration into the model data. By injecting options containing 'create' => true, an attacker could bypass the authorization settings configured by the site developer in the user and model blueprints.

Recommendations Update to version 4.9.0 or newer. Update to version 5.4.0 or newer.

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2026-41325

GHSA-6GQR-MX34-WH8R

Affected Products

Kirby

References · 12

• https://github.com/getkirby/kirby/security/advisories/GHSA-6gqr-mx34-wh8r · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-6gqr-mx34-wh8r · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-41325 · Security Note
• https://github.com/getkirby/kirby · Note
• https://github.com/getkirby/kirby/releases/tag/5.4.0 · Note
• https://github.com/getkirby/kirby/releases/tag/4.9.0 · Note
• https://twitter.com/_cvereports/status/2049063733666672645 · Twitter Post
• https://twitter.com/dailycve/status/2047782436872843714 · Twitter Post
• https://reddit.com/r/VulnMatter/comments/1sx7q7j/resumen_diario_de_vulnerabilidades_27042026 · Reddit Post
• https://reddit.com/r/VulnMatter/comments/1sy0a2l/resumen_diario_de_vulnerabilidades_28042026 · Reddit Post
• https://twitter.com/CVEnew/status/2048099339562598539 · Twitter Post
• https://twitter.com/DFIR_Lab/status/2049301944699658722 · Twitter Post