Authentication Bypass in phpMyFAQ Affects Keycloak Users
CVE-2026-111898

7.7HIGH

Key Information:

Vendor

Thorsten

Status
pHPMyFAQ
Vendor
CVE Published:
17 October 2026

What is CVE-2026-111898?

A vulnerability in phpMyFAQ prior to version 4.2.0-beta allows an attacker with a Keycloak identity to bypass authentication. By exploiting a match in the preferred_username or email between their Keycloak account and local accounts, an attacker can gain unauthorized access. This results in the potential for superadmin privileges via the /auth/keycloak/authorize endpoint, making it crucial for users to update to secure versions immediately.

Affected Version(s)

phpMyFAQ 4.2.0-alpha < 4.2.0-beta

phpMyFAQ 4.2.0-beta

References

https://github.com/thorsten/phpMyFAQ/security/advisories/...
vendor-advisory
https://www.vulncheck.com/advisories/phpmyfaq-4.2.0-alpha...
third-party-advisory

CVSS V4

Score:
7.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

bp0lr
.