CVE-2026-27836
CVE-2026-27836 · phpMyFAQ Allows Unauthenticated Account Creation via WebAuthn Prepare Endpoint
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 7.5 · High · EPSS 0.5% · Fix available
- Published
- Updated
Stack: php
Affected products and versions
phpmyfaq
- Versions
- < 4.0.18: Affected
No fix published
thorsten/phpmyfaq Packagist
- Versions
- 2.10.0-alpha
- 2.8.0
- 2.8.0-RC
- 2.8.0-RC2
- 2.8.0-RC3
- 2.8.0-RC4
- 2.8.0-alpha2
- 2.8.0-alpha3
- 2.8.0-beta
- 2.8.0-beta2
- 2.8.0-beta3
- 2.8.1
- 2.8.10
- 2.8.11
- 2.8.12
- 2.8.13
- 2.8.14
- 2.8.15
- 2.8.16
- 2.8.17
- 2.8.18
- 2.8.19
- 2.8.2
- 2.8.20
- 2.8.21
- 2.8.22
- 2.8.23
- 2.8.24
- 2.8.25
- 2.8.26
- 2.8.27
- 2.8.28
- 2.8.29
- 2.8.3
- 2.8.4
- 2.8.5
- 2.8.6
- 2.8.7
- 2.8.8
- 2.8.9
- 2.9.0
- 2.9.0-alpha
- 2.9.0-alpha2
- 2.9.0-alpha3
- 2.9.0-alpha4
- 2.9.0-beta
- 2.9.0-beta2
- 2.9.0-rc
- 2.9.0-rc2
- 2.9.0-rc3
- 2.9.0-rc4
- 2.9.1
- 2.9.10
- 2.9.11
- 2.9.12
- 2.9.13
- 2.9.2
- 2.9.3
- 2.9.4
- 2.9.5
- 2.9.6
- 2.9.7
- 2.9.8
- 2.9.9
- 3.0.0
- 3.0.0-RC
- 3.0.0-RC.2
- 3.0.0-alpha
- 3.0.0-alpha.2
- 3.0.0-alpha.3
- 3.0.0-alpha.4
- 3.0.0-beta
- 3.0.0-beta.2
- 3.0.0-beta.3
- 3.0.1
- 3.0.10
- 3.0.11
- 3.0.12
- 3.0.2
- 3.0.3
- 3.0.4
- 3.0.5
- 3.0.6
- 3.0.7
- 3.0.8
- 3.0.9
- 3.1.0
- 3.1.0-RC
- 3.1.0-alpha
- 3.1.0-alpha.2
- 3.1.0-alpha.3
- 3.1.0-beta
- 3.1.1
- 3.1.10
- 3.1.11
- 3.1.12
- 3.1.13
- 3.1.14
- 3.1.15
- 3.1.16
- 3.1.17
- 3.1.18
- 3.1.2
- 3.1.3
- 3.1.4
- 3.1.5
- 3.1.6
- 3.1.7
- 3.1.8
- 3.1.9
- 3.2.0
- 3.2.0-RC
- 3.2.0-RC.2
- 3.2.0-RC.4
- 3.2.0-alpha
- 3.2.0-beta
- 3.2.0-beta.2
- 3.2.1
- 3.2.10
- 3.2.2
- 3.2.3
- 3.2.4
- 3.2.5
- 3.2.6
- 3.2.7
- 3.2.8
- 3.2.9
- 4.0.0
- 4.0.0-RC
- 4.0.0-RC.2
- 4.0.0-RC.3
- 4.0.0-RC.4
- 4.0.0-RC.5
- 4.0.0-alpha
- 4.0.0-alpha.2
- 4.0.0-alpha.3
- 4.0.0-alpha.4
- 4.0.0-beta
- 4.0.0-beta.2
- 4.0.1
- 4.0.10
- 4.0.11
- 4.0.12
- 4.0.13
- 4.0.14
- 4.0.15
- 4.0.16
- 4.0.2
- 4.0.3
- 4.0.4
- 4.0.5
- 4.0.6
- 4.0.7
- 4.0.8
- 4.0.9
- Affected ranges
- ECOSYSTEM: < 4.0.18
Update to 4.0.18