What is CVE-2026-76209?

CVE-2026-76209 is a medium-severity vulnerability in Thorsten Phpmyfaq, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-08-19.

How severe is CVE-2026-76209?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Thorsten Phpmyfaq

CVE-2026-76209

phpMyFAQ versions before v4.1.6 fail to validate the security.enableRegistration setting in API endpoints, allowing attackers to create user accounts when registration is disabled. Attackers can bypass the registration restriction by submitting requests to POST /api/register or POST /api/v3.1/register endpoints, which do not check the configuration flag enforced by the HTML registration page.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

Affected products

Thorsten Phpmyfaq

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-76209?: CVE-2026-76209 is a medium-severity vulnerability in Thorsten Phpmyfaq, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-08-19.
How severe is CVE-2026-76209?: Medium severity. CVSS v3 base score is 4.3 out of 10.