---
id: "CVE-2026-111898"
kind: "vulnerability"
aliases: ["CVE-2026-111898"]
title: "phpMyFAQ: Keycloak login lets attackers take over local accounts"
severity: "high"
cvss: 7.7
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["keycloak", "package", "php", "phpmyfaq", "self-hosted"]
not_affected_if: ["default-config", "local-auth-only"]
published_at: "2026-10-17T19:16:31+00:00"
first_seen_at: "2026-10-23T21:57:14+00:00"
updated_at: "2026-10-25T03:12:06+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111898", "first_seen_at": "2026-10-23T21:57:14+00:00"}]
---

# phpMyFAQ: Keycloak login lets attackers take over local accounts

phpMyFAQ 4.2.0-alpha before 4.2.0-beta matches Keycloak logins to existing local accounts by preferred_username or email without proper verification. An attacker who controls a Keycloak identity with a colliding username or unverified email can log in through /auth/keycloak/authorize and gain superadmin privileges.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed phpMyFAQ version in the admin panel or in the release files; affected versions are 4.2.0-alpha up to but not including `4.2.0-beta`.
- Check whether Keycloak login is enabled for the instance, for example by looking for the `/auth/keycloak/authorize` route in the web server logs.

## Fix

- Upgrade phpMyFAQ to `4.2.0-beta` or later.
- Until then, disable the Keycloak login integration if it is not needed.

## Timeline

- 2026-10-23T21:57:14+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-111898

## From the sources

phpMyFAQ 4.2.0-alpha before 4.2.0-beta contains an authentication bypass vulnerability that allows Keycloak users to take over local accounts by matching preferred_username or email. Attackers controlling a Keycloak identity with a colliding username or unverified email can log in through /auth/keycloak/authorize to bind their subject and gain superadmin privileges.

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