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CVE-2026-46364

9.8 CRITICAL

phpMyFAQ before 4.1.2 contains an unauthenticated SQL injection vulnerability in BuiltinCaptcha::garbageCollector() and BuiltinCaptcha::s...

Published: 2026-05-15 · Last updated: 2026-05-28

Severity and scoring

CVSS
9.8 CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-89

Description

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.

Source: NVD

QSearch commentary

SQL injection in a CAPTCHA garbage-collector function is the canonical "security-feature defeats security" finding. The fact that a CAPTCHA module — a defensive control — opens an unauthenticated SQLi shows why our Application Security engagements always include adjacent defensive features in the attack surface map. Defense-in-depth fails when one of the defenses is itself the injection vector.

— QSearch Security Research · 2026-05-19

References

Engagement axis

This CVE class is addressed in the QSearch continuous-protection axis.

Learn more about this axis →

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