CVE-2026-111898 phpMyFAQ 4.2.0-alpha before 4.2.0-beta Account Takeover via Keycloak Implicit Account Linking
Attackers can take over local accounts and gain superadmin privileges by exploiting Keycloak implicit account linking via colliding usernames or unverified emails.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-111898?
CVE-2026-111898 is a high-severity authentication bypass vulnerability in thorsten phpMyFAQ, published on 17 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-287
Which versions are affected by CVE-2026-111898?
How do I fix CVE-2026-111898?
No fix has been published for CVE-2026-111898 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-111898 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111898 exists.
Sources
Also known as GHSA-8rmr-jc2p-xv7g, GHSA-rg4w-2j3r-2hhp.