CVE-2026-27836

HIGH SEVERITY

CVSS Score & Metrics

Base Score

7.5 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N                                    

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.

Vulnerability Details

Published Date

February 27, 2026

Last Modified

March 04, 2026

CWE ID

CWE-862

Source

NVD

Vendor

thorsten

Product

phpMyFAQ

External References

https://github.com/thorsten/phpMyFAQ/commit/f2ab673f0668753cd0f7c7c8bc7fd2304dcf5cb1
https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-w22q-m2fm-x9f4

CVE-2026-27836

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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