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CVE Vulnerability Details :
CVE-2026-27836
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-27 Feb, 2026 | 19:54
Updated At-27 Feb, 2026 | 19:54
Rejected At-
▼CVE Numbering Authority (CNA)
phpMyFAQ Allows Unauthenticated Account Creation via WebAuthn Prepare Endpoint

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.

Affected Products
Vendor
Thorsten Rinne (phpMyFAQ)thorsten
Product
phpMyFAQ
Versions
Affected
  • < 4.0.18
Problem Types
TypeCWE IDDescription
CWECWE-862CWE-862: Missing Authorization
Type: CWE
CWE ID: CWE-862
Description: CWE-862: Missing Authorization
Metrics
VersionBase scoreBase severityVector
3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-w22q-m2fm-x9f4
x_refsource_CONFIRM
https://github.com/thorsten/phpMyFAQ/commit/f2ab673f0668753cd0f7c7c8bc7fd2304dcf5cb1
x_refsource_MISC
Hyperlink: https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-w22q-m2fm-x9f4
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/thorsten/phpMyFAQ/commit/f2ab673f0668753cd0f7c7c8bc7fd2304dcf5cb1
Resource:
x_refsource_MISC
Details not found