CVE-2026-46364

CRITICAL 9.8

phpMyFAQ - SQL Injection via User-Agent Header in BuiltinCaptcha

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-89
Vendor	thorsten
Product	phpmyfaq
Published	May 15, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

thorsten / phpmyfaq

0 < 4.1.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-289f-fq7w-6q2w github.com: https://github.com/thorsten/phpMyFAQ/commit/b9f25109fddb38eee19987183798638d07943f92 vulncheck.com: https://www.vulncheck.com/advisories/phpmyfaq-sql-injection-via-user-agent-header-in-builtincaptcha

Credits

🔍 adrgs aisafe-bot