CVE-2026-111911

phpMyFAQ 4.0.0 before 4.1.9 Authentication Bypass via WebAuthn Credential Injection

Published Oct 17, 2026 CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Description
phpMyFAQ 4.0.0 before 4.1.9 contains an authentication bypass vulnerability where WebAuthn registration endpoints attach credentials to any account without authentication or challenge validation. Attackers can stage a victim username, submit a forged fmt=none attestation to register a passkey, then log in bypassing passwords and TOTP for account takeover.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Thorsten
Thorsten phpmyfaq
Vendors & Products Thorsten
Thorsten phpmyfaq
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description phpMyFAQ 4.0.0 before 4.1.9 contains an authentication bypass vulnerability where WebAuthn registration endpoints attach credentials to any account without authentication or challenge validation. Attackers can stage a victim username, submit a forged fmt=none attestation to register a passkey, then log in bypassing passwords and TOTP for account takeover.
Title phpMyFAQ 4.0.0 before 4.1.9 Authentication Bypass via WebAuthn Credential Injection
First Time appeared Phpmyfaq
Phpmyfaq phpmyfaq
Weaknesses CWE-287
CPEs cpe:2.3:a:phpmyfaq:phpmyfaq:*:*:*:*:*:*:*:*
Vendors & Products Phpmyfaq
Phpmyfaq phpmyfaq
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 19, 2026, 2:54 PM
Reserved
Oct 17, 2026, 12:18 PM
Status
Deferred
Published
Oct 17, 2026, 7:16 PM
Modified
Oct 19, 2026, 3:16 PM