CVE-2026-27836

7.5 highEPSS 0.5%

High (7.5) in phpmyfaq phpmyfaq. EPSS 0.5% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.5 high

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

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 39% of CVEs (scores of 2026-10-31)
CWE: CWE-862
Published: 2026-02-27
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

phpmyfaq:phpmyfaq

References

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

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