CVE-2026-124432 phpMyFAQ before 4.1.11 and 4.2.0-beta.3 Account Enumeration via WebAuthn prepare-login
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-124432?
CVE-2026-124432 is a medium-severity vulnerability in thorsten phpMyFAQ, published on 8 Nov 2026.
Official description
phpMyFAQ 4.1.9 before 4.1.11 and 4.2.0 pre-releases before 4.2.0-beta.3 contain an account enumeration vulnerability in the unauthenticated POST /api/webauthn/prepare-login endpoint, which returns stable stored credential IDs for passkey-registered accounts but an md5(time())-derived fallback ID otherwise. Unauthenticated attackers can compare allowCredentials IDs from requests sent more than one second apart, without rate limiting, to identify existing passkey-registered accounts and their credential IDs.
Weakness: CWE-204
Which versions are affected by CVE-2026-124432?
How do I fix CVE-2026-124432?
No fix has been published for CVE-2026-124432 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-124432 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-124432 exists.
Sources
Also known as GHSA-2rvx-pqfw-q35r, GHSA-f46v-r9r2-mgmc.