Access Control Weakness in Kirby CMS by Getkirby
CVE-2026-42069

7.1HIGH

Key Information:

Vendor

Getkirby

Status
Kirby
Vendor
CVE Published:
9 May 2026

What is CVE-2026-42069?

The Kirby CMS, an open-source content management system, experienced a significant access control vulnerability prior to versions 4.9.0 and 5.4.0. This flaw allowed unauthorized users to gain read access to site, user, and role information without appropriate permissions. To mitigate the risk, users are advised to upgrade to the patched versions immediately.

Affected Version(s)

kirby < 4.9.0 < 4.9.0

kirby >= 5.0.0, < 5.4.0 < 5.0.0, 5.4.0

References

https://github.com/getkirby/kirby/security/advisories/GHS...
x_refsource_CONFIRM
https://github.com/getkirby/kirby/releases/tag/4.9.0
x_refsource_MISC
https://github.com/getkirby/kirby/releases/tag/5.4.0
x_refsource_MISC

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.