SQL injection in phpMyFAQ - CVE-2026-109573
Published: November 11, 2026 / Updated: November 13, 2026
Vulnerability identifier: #VU165944
CSH Severity: High
CVSS v4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-109573
CWE-ID: CWE-89
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose database secrets, modify or delete records, and destroy database tables.
The vulnerability exists due to SQL injection in phpMyFAQ PdoMysql::escape() when backslash-escaped quotes are interpreted literally under MySQL or MariaDB NO_BACKSLASH_ESCAPES mode. A remote attacker can submit U+2019 (’) followed by SQL through /api/autocomplete, where normalization introduces an ASCII single quote after filtering, or submit raw quotes through administrative forms with appropriate privileges, to execute arbitrary SQL.
Affected software
phpMyFAQ
How to mitigate CVE-2026-109573
Install security update from vendor's website.
phpMyFAQ - update to 4.1.9