CVE-2026-46364: Thorsten Phpmyfaq

Critical severity, CVSS 9.8. EPSS: 2.1% chance of exploitation in the next 30 days.

phpMyFAQ before 4.1.2 contains an unauthenticated SQL injection vulnerability in BuiltinCaptcha::garbageCollector() and BuiltinCaptcha::saveCaptcha() methods that interpolate unsanitized User-Agent headers into DELETE and INSERT queries. Unauthenticated attackers can exploit the public GET /api/captcha endpoint by crafting malicious User-Agent headers to perform time-based blind SQL injection, extracting sensitive data including user credentials, admin tokens, and SMTP credentials from the database.

Affected products

• Thorsten Phpmyfaq: before 4.1.2 (fixed in 4.1.2)

Published 2026-05-15. Last modified 2026-06-17.