What is CVE-2026-53756?

CVE-2026-53756 is a medium-severity vulnerability, classified under SQL Injection. CVSS score: 4.9/10. Published 2026-09-04.

How severe is CVE-2026-53756?

Medium severity. CVSS v3 base score is 4.9 out of 10.

CVE-2026-53756

CVE-2026-53756

Emlog is an open source website building system. Prior to version 2.6.16, Emlog CMS Pro contains a blind SQL injection in User_Model::getUserDataByLogin(). The $account parameter is directly interpolated into SQL queries without any filtering. The vulnerability is reachable through the auth cookie validation path, where $username is extracted from the cookie and passed unfiltered into SQL — guarded only by an HMAC signature that requires AUTH_KEY to forge. This issue has been patched in version 2.6.16.

Vulnerability class: SQL Injection

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

Weakness classification (CWE)

CWE-89 — SQL Injection

References

Frequently asked questions

What is CVE-2026-53756?: CVE-2026-53756 is a medium-severity vulnerability, classified under SQL Injection. CVSS score: 4.9/10. Published 2026-09-04.
How severe is CVE-2026-53756?: Medium severity. CVSS v3 base score is 4.9 out of 10.