What is CVE-2026-124432?

CVE-2026-124432 is a high-severity vulnerability, classified under Observable Response Discrepancy. CVSS score: 7.3/10. Published 2026-11-08.

How severe is CVE-2026-124432?

High severity. CVSS v3 base score is 7.3 out of 10.

CVE-2026-124432

CVE-2026-124432

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.

Published 2026-11-08 · last modified 2026-11-08.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Weakness classification (CWE)

CWE-204 — Observable Response Discrepancy

References

GitHub Security Advisory (GHSA-2rvx-pqfw-q35r) (vendor-advisory)
VulnCheck Advisory: phpMyFAQ before 4.1.11 and 4.2.0-beta.3 Account Enumeration via WebAuthn prepare-login (third-party-advisory)

Frequently asked questions

What is CVE-2026-124432?: CVE-2026-124432 is a high-severity vulnerability, classified under Observable Response Discrepancy. CVSS score: 7.3/10. Published 2026-11-08.
How severe is CVE-2026-124432?: High severity. CVSS v3 base score is 7.3 out of 10.