Improper Verification of Cryptographic Signature Affecting phpmyfaq/phpmyfaq package, versions >=4.0.0, <4.1.9
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-PHPMYFAQPHPMYFAQ-21717184
- published26 Oct 2026
- disclosed17 Oct 2026
- creditHieuDC-SAS-NightWolf
Introduced: 17 Oct 2026
NewCVE-2026-111911 (opens in a new tab)How to fix?
Upgrade phpmyfaq/phpmyfaq to version 4.1.9 or higher.
Overview
phpmyfaq/phpmyfaq is a FAQ system for PHP and MySQL, PostgreSQL and other databases
Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature via the register() method in AuthWebAuthn.php, which fails to validate the WebAuthn registration challenge and lacks a CSRF check. An unauthenticated attacker can forge a WebAuthn registration request by replaying or crafting a response that omits or substitutes the one-time challenge, bypassing the binding between the server-issued challenge and the authenticator's attestation. This allows the attacker to register an arbitrary credential, leading to full account compromise.