CVE-2026-27836

HighCVSS 7.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-862

Affected software

Vendor	Product	Versions
thorsten	phpMyFAQ	< 4.0.18

References

https://github.com/thorsten/phpMyFAQ/commit/f2ab673f0668753cd0f7c7c8bc7fd2304dcf5cb1Patch
https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-w22q-m2fm-x9f4Exploit, Vendor Advisory

Timeline

Published: Feb 27, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

Related CVEs from 2026

CVE-2026-278379.8Dottie provides nested object access and manipulation in JavaScript. Versions 2.0.4 through 2.0.6 contain an incomplete fix for CVE-2023-261 CVE-2026-278383.5wger is a free, open-source workout and fitness manager. Five routine detail action endpoints check a cache before calling `self.get_object(CVE-2026-278394.3wger is a free, open-source workout and fitness manager. In versions up to and including 2.4, three `nutritional_values` action endpoints fe CVE-2026-27849.8Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thund CVE-2026-278404.3ZITADEL is an open source identity management platform. Starting in version 2.31.0 and prior to versions 3.4.7 and 4.11.0, opaque OIDC acces CVE-2026-278418.1A vulnerability in SenseLive X3050's web management interface allows state-changing operations to be triggered without proper Cross-Site Req CVE-2026-278429.3Authentication bypass issue exists in MR-GM5L-S1 and MR-GM5A-L1, which may allow an attacker to bypass authentication and change the device CVE-2026-278439.1A vulnerability exists in SenseLive X3050's web management interface that allows critical configuration parameters to be modified without su CVE-2026-278442.7Uncaught Exception (CWE-248) in the Controller 6000 and Controller 7000 diagnostic web interface allows an authenticated and authorized oper CVE-2026-278466.2Due to missing authentication, a user with physical access to the device can misuse the mesh functionality for adding a new mesh device to t CVE-2026-278479.8Due to improper neutralization of special elements, SQL statements can be injected via the handshake of a TLS-SRP connection. This can be us CVE-2026-278489.8Due to missing neutralization of special elements, OS commands can be injected via the handshake of a TLS-SRP connection, which are ultimate