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I. Basic Information for CVE-2026-27836
Vulnerability Information
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Vulnerability Title
phpMyFAQ Allows Unauthenticated Account Creation via WebAuthn Prepare Endpoint
Source: NVD (National Vulnerability Database)
Vulnerability Description
phpMyFAQ is an open source FAQ web application. Prior to version 4.0.18, the WebAuthn prepare endpoint (`/api/webauthn/prepare`) creates new active user accounts without any authentication, CSRF protection, captcha, or configuration checks. This allows unauthenticated attackers to create unlimited user accounts even when registration is disabled. Version 4.0.18 fixes the issue.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制缺失
Source: NVD (National Vulnerability Database)
Vulnerability Title
phpMyFAQ 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
phpMyFAQ是Thorsten Rinne个人开发者的一个多语言、完全由数据库驱动的常见问题解答系统。 phpMyFAQ 4.0.18之前版本存在安全漏洞，该漏洞源于WebAuthn prepare端点缺少身份验证和CSRF保护，可能导致未经验证的攻击者创建无限用户账户。
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
VendorProductAffected VersionsCPESubscribe
thorstenphpMyFAQ < 4.0.18 -
II. Public POCs for CVE-2026-27836
#POC DescriptionSource LinkShenlong Link
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kimi-k2.5 · 10146 chars
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III. Intelligence Information for CVE-2026-27836
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IV. Related Vulnerabilities
Same product: phpMyFAQ
Same vendor: thorsten
Same weakness: CWE-862
V. Comments for CVE-2026-27836

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