Path Traversal Vulnerability in Kirby CMS Affecting Multiple Versions
CVE-2026-44177

8.8HIGH

Key Information:

Vendor

Getkirby

Status
Kirby
Vendor
CVE Published:
16 July 2026

What is CVE-2026-44177?

Kirby CMS, an open-source content management system, has a path traversal vulnerability present in versions 5.3.0 to 5.4.0. This issue arises from improper validation of user IDs, allowing attackers to exploit the authentication API and users API to include arbitrary PHP files and probe for sensitive information on the server. As a result, the vulnerability could lead to unauthorized access to critical files and server configurations. This issue was resolved in version 5.4.1, which ensures proper validation of user inputs and enhances overall security.

Affected Version(s)

kirby >= 5.3.0, < 5.4.1

References

https://github.com/getkirby/kirby/security/advisories/GHS...
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https://github.com/getkirby/kirby/releases/tag/5.4.1
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CVSS V4

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.