---
title: "CVE-2026-111898: phpMyFAQ - Authentication Bypass"
description: "phpMyFAQ < 4.2.0-beta contains an authentication bypass caused by improper validation of Keycloak preferred_username or email in /auth/keycloak/authorize, letting attackers with colliding usernames or unverified emails gain superadmin privileges."
url: https://panop.io/threat-heartbeat/CVE-2026-111898/
---

# CVE-2026-111898 phpMyFAQ - Authentication Bypass

phpMyFAQ < 4.2.0-beta contains an authentication bypass caused by improper validation of Keycloak preferred\_username or email in /auth/keycloak/authorize, letting attackers with colliding usernames or unverified emails gain superadmin privileges.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.34% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-111898)

## Details

Type

Broken Authentication

Impact

Privilege Escalation, Broken Authentication

CVSS vector

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

Published

17 October 2026

Updated

19 October 2026

Weakness

[CWE-287](https://cwe.mitre.org/data/definitions/287.html)

## Vendor fix

Update to version 4.2.0-beta or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-111898](https://nvd.nist.gov/vuln/detail/CVE-2026-111898)
- [https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-rg4w-2j3r-2hhp](https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-rg4w-2j3r-2hhp)
- [https://www.vulncheck.com/advisories/phpmyfaq-4.2.0-alpha-before-4.2.0-beta-account-takeover-via-keycloak-implicit-account-linking](https://www.vulncheck.com/advisories/phpmyfaq-4.2.0-alpha-before-4.2.0-beta-account-takeover-via-keycloak-implicit-account-linking)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)