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CVE-2026-46364— phpMyFAQ - SQL Injection via User-Agent Header in BuiltinCaptcha

Quick assessment

Affected
thorsten phpmyfaq
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

phpMyFAQ是Thorsten Rinne个人开发者的一个多语言、完全由数据库驱动的常见问题解答系统。 phpMyFAQ 4.1.2之前版本存在SQL注入漏洞，该漏洞源于BuiltinCaptcha::garbageCollector和BuiltinCaptcha::saveCaptcha方法将未清理的User-Agent标头插入DELETE和INSERT查询，可能导致未经身份验证的攻击者通过公共GET /api/captcha端点利用恶意User-Agent标头执行基于时间的盲SQL注入，提取用户凭

CVSS 9.8 · Critical EPSS 2.12% · P81

Public Exploits 1

Nuclei · 1 CVE-2026-46364.yaml [template]

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
thorsten phpmyfaq < 4.1.2 affected
4.1.2 unaffected
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I. Basic Information for CVE-2026-46364

Vulnerability Information
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Vulnerability Title
phpMyFAQ - SQL Injection via User-Agent Header in BuiltinCaptcha
Source: CVE Program / CVE List V5
Vulnerability 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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
SQL命令中使用的特殊元素转义处理不恰当(SQL注入)
Source: CVE Program / CVE List V5
Vulnerability Title
phpMyFAQ SQL注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
phpMyFAQ是Thorsten Rinne个人开发者的一个多语言、完全由数据库驱动的常见问题解答系统。 phpMyFAQ 4.1.2之前版本存在SQL注入漏洞，该漏洞源于BuiltinCaptcha::garbageCollector和BuiltinCaptcha::saveCaptcha方法将未清理的User-Agent标头插入DELETE和INSERT查询，可能导致未经身份验证的攻击者通过公共GET /api/captcha端点利用恶意User-Agent标头执行基于时间的盲SQL注入，提取用户凭
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
thorsten phpmyfaq 0 ~ 4.1.2 -

II. Public POCs for CVE-2026-46364

# POC Description Source Link Shenlong Link
1 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. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-46364.yaml POC Details
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III. Intelligence Information for CVE-2026-46364

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Patches & Fixes for CVE-2026-46364 (1)

Vendor Advisories for CVE-2026-46364 (2)

Same Patch Batch · thorsten · 2026-05-15 · 13 CVEs total

CVE-2026-45010 9.1 CRITICAL phpMyFAQ - Unauthenticated Two-Factor Authentication Brute-Force via /admin/check Endpoint
CVE-2026-46367 7.6 HIGH phpMyFAQ - Stored XSS via Utils::parseUrl() in Comment Rendering
CVE-2026-46359 7.5 HIGH phpMyFAQ - SQL Injection in CurrentUser::setTokenData via Unescaped OAuth Token Fields
CVE-2026-46366 7.5 HIGH phpMyFAQ - Unauthenticated Information Disclosure via getIdFromSolutionId Permission Bypas
CVE-2026-46361 6.9 MEDIUM phpMyFAQ - Stored Cross-Site Scripting via raw Filter in search.twig
CVE-2026-45008 6.5 MEDIUM phpMyFAQ - Path Traversal in Client::deleteClientFolder via URL Parameter
CVE-2026-46362 6.5 MEDIUM phpMyFAQ - Authorization Bypass in Admin Pages via Non-Terminating Permission Check
CVE-2026-46360 5.4 MEDIUM phpMyFAQ - Stored XSS via Entity Decoding Depth Limit Bypass in SVG Sanitizer
CVE-2026-46363 5.4 MEDIUM phpMyFAQ - Stored XSS in FAQ Question/Answer via Encode-Decode Bypass
CVE-2026-46365 5.4 MEDIUM phpMyFAQ - Missing Authorization in Tag Deletion Endpoint
CVE-2026-45007 4.3 MEDIUM phpMyFAQ - Missing Permission Check on 12 Configuration API Endpoints Allows Information D
CVE-2026-45009 4.3 MEDIUM phpMyFAQ - Insufficient Authorization Check in Admin API Endpoints

IV. Related Vulnerabilities

Same product: phpmyfaq
Same vendor: thorsten
Same weakness: CWE-89

V. Comments for CVE-2026-46364

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