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CVE-2026-76212— phpMyFAQ before 4.1.7 LIKE Wildcard Injection via PostgreSQL

Quick assessment

Affected
thorsten phpMyFAQ
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Thorsten Rinne phpMyFAQ是Thorsten Rinne个人开发者的一款常见问题解答管理系统。 Thorsten Rinne phpMyFAQ 4.1.7之前版本存在命令注入漏洞，该漏洞源于在Search/Database/Pgsql.php后端中错误声明LIKE ESCAPE字符为'='，导致通配符转义失效，用户提供的%和_字符仍然作为LIKE通配符生效，可能导致未经身份验证的攻击者在公共FAQ搜索表单中提交此类字符，强制进行最大范围的模式匹配和昂贵的顺序扫描，造成拒绝服务攻击。

CVSS 5.3 · Medium EPSS 0.30% · P22

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 2

VendorProduct Version RangeStatus
thorsten phpMyFAQ 4.2.0-alpha< 4.1.7 affected
4.1.7 unaffected
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I. Basic Information for CVE-2026-76212

Vulnerability Information
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Vulnerability Title
phpMyFAQ before 4.1.7 LIKE Wildcard Injection via PostgreSQL
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
参数注入或修改
Source: CVE Program / CVE List V5
Vulnerability Title
Thorsten Rinne phpMyFAQ 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Thorsten Rinne phpMyFAQ是Thorsten Rinne个人开发者的一款常见问题解答管理系统。 Thorsten Rinne phpMyFAQ 4.1.7之前版本存在命令注入漏洞，该漏洞源于在Search/Database/Pgsql.php后端中错误声明LIKE ESCAPE字符为'='，导致通配符转义失效，用户提供的%和_字符仍然作为LIKE通配符生效，可能导致未经身份验证的攻击者在公共FAQ搜索表单中提交此类字符，强制进行最大范围的模式匹配和昂贵的顺序扫描，造成拒绝服务攻击。
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 4.2.0-alpha ~ 4.1.7 -

II. Public POCs for CVE-2026-76212

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III. Intelligence Information for CVE-2026-76212

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Vendor Advisories for CVE-2026-76212 (2)

Same Patch Batch · thorsten · 2026-08-19 · 14 CVEs total

CVE-2026-75918 8.8 HIGH phpMyFAQ before 4.1.7 Authentication Bypass via Tracking File
CVE-2026-76208 8.2 HIGH phpMyFAQ 3.1.0 through 4.1.6 Authentication Bypass via LDAP
CVE-2026-76205 8.1 HIGH phpMyFAQ before 4.1.7 SQL Injection via Glossary
CVE-2026-76207 8.1 HIGH phpMyFAQ before 4.1.7 2FA Bypass via Remember-Me Cookie
CVE-2026-76213 7.4 HIGH phpMyFAQ before 4.1.7 2FA Brute-Force via Session-Scoped Throttle
CVE-2026-76214 7.4 HIGH phpMyFAQ before 4.1.7 WebAuthn Replay Attack via Challenge
CVE-2026-76210 6.5 MEDIUM phpMyFAQ before v4.1.6 Local File Disclosure via PDF Export
CVE-2026-75919 5.3 MEDIUM phpMyFAQ before 4.1.7 Authentication Bypass via Setup API
CVE-2026-75920 5.3 MEDIUM phpMyFAQ before 4.1.6 Information Disclosure via Backup ZIP
CVE-2026-76206 5.3 MEDIUM phpMyFAQ before 4.1.7 Information Disclosure via PDF Export
CVE-2026-76215 5.3 MEDIUM phpMyFAQ before 4.1.7 Missing Authorization via child resources
CVE-2026-76209 4.3 MEDIUM phpMyFAQ before v4.1.6 Registration Bypass via API
CVE-2026-76211 4.3 MEDIUM phpMyFAQ before 4.1.7 Information Disclosure via Admin API

IV. Related Vulnerabilities

Same product: phpMyFAQ
Same vendor: thorsten
Same weakness: CWE-88

V. Comments for CVE-2026-76212

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