CVE-2026-42051— Kirby: System API endpoint leaks license data and installed version to authenticated users
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I. Basic Information for CVE-2026-42051
Vulnerability Information
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Vulnerability Title
Kirby: System API endpoint leaks license data and installed version to authenticated users
Source: NVD (National Vulnerability Database)
Vulnerability Description
Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, the system API endpoint leaks license data and installed version to authenticated users. This issue has been patched in versions 4.9.0 and 5.4.0.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制缺失
Source: NVD (National Vulnerability Database)
Vulnerability Title
Kirby 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kirby是Kirby开源的一套基于文件的内容管理系统（CMS）。 Kirby 4.9.0之前版本和5.4.0之前版本存在安全漏洞，该漏洞源于系统API端点泄露许可证数据和已安装版本给已认证用户。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-42051
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Advisory · 1
- Release 5.4.0 · getkirby/kirby · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-42051
Same Patch Batch · getkirby · 2026-05-09 · 4 CVEs total
| CVE-2026-42069 | Kirby: Read access to site, user and role information is not gated by permissions | |
| CVE-2026-42137 | Kirby: `pages.access/list` and `files.access/list` permissions are not consistently checke | |
| CVE-2026-42174 | Kirby: User avatar creation, replacement and deletion are not gated by user update permiss |
IV. Related Vulnerabilities
Same product: kirby
- CVE-2026-42174
Kirby: User avatar creation, replacement and deletion are no - CVE-2026-42137
Kirby: `pages.access/list` and `files.access/list` permissio - CVE-2026-42069
Kirby: Read access to site, user and role information is not - CVE-2026-41325
Kirby is vulnerable to authorization bypass during page, fil - CVE-2026-40099
Kirby's page creation API bypasses the changeStatus permissi
Same vendor: getkirby
- CVE-2026-42174
Kirby: User avatar creation, replacement and deletion are no - CVE-2026-42137
Kirby: `pages.access/list` and `files.access/list` permissio - CVE-2026-42069
Kirby: Read access to site, user and role information is not - CVE-2026-41325
Kirby is vulnerable to authorization bypass during page, fil - CVE-2026-40099
Kirby's page creation API bypasses the changeStatus permissi
Same weakness: CWE-862
- CVE-2026-8681
Essential Chat Support <= 1.0.1 - Missing Authorization to U - CVE-2026-45667
Open WebUI: Unauthenticated endpoint can trigger embedding g - CVE-2026-44571
Open WebUI: Improper Authorization in Standard Channels Allo - CVE-2026-45350
Open WebUI: Chat completion API allows tool restrictions to - CVE-2026-44569
Open WebUI: Insecure Message Access Breaks Authorization
V. Comments for CVE-2026-42051
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