CVE-2026-76212

phpMyFAQ before 4.1.7, when configured to use PostgreSQL via the native pgsql PHP extension, declares an incorrect LIKE ESCAPE character ('=') in the Search/Database/Pgsql.php backend while escapeLikeWildcards() escapes user input with the '|' prefix. As a result, wildcard escaping is a no-op and user-supplied % and _ characters remain active LIKE wildcards. An unauthenticated attacker can submit such characters in the public FAQ search form to force maximally broad pattern matches and expensive sequential scans, resulting in a denial of service. The PDO PostgreSQL backend is not affected, and quotes remain escaped so this does not enable quote-breaking SQL injection or data exfiltration.

• CWE-88

• https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-5hx6-c293-588hExploit, Mitigation, Vendor Advisory
• https://www.vulncheck.com/advisories/phpmyfaq-before-like-wildcard-injection-via-postgresqlThird Party Advisory
• https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-5hx6-c293-588hExploit, Mitigation, Vendor Advisory

Published

Aug 19, 2026

Last Modified

Sep 1, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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