{"id":"CVE-2026-119561","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-119561","summary":"phpMyAdmin through 5.2.3 WebAuthn Two-Factor Authentication Bypass via CustomServer","details":"phpMyAdmin through 5.2.3 contains an authentication bypass vulnerability in CustomServer::parseAndValidateAssertionResponse() that never verifies WebAuthn assertion signatures against stored public keys. Attackers holding a victim's MySQL credentials can POST a crafted webauthn_request_response with matching challenge, origin, and rpIdHash to bypass the second factor and gain database privileges.","published":"2026-10-30T11:31:09.654Z","modified":"2026-11-01T02:47:40.858113301Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://abraxaslabs.tech/research/PMA-5.2.3-WebAuthn-2FA"},{"type":"ADVISORY","url":"https://abraxaslabs.tech/research/phpmyadmin-webauthn"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/119xxx/CVE-2026-119561.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119561"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/phpmyadmin-through-5.2.3-webauthn-two-factor-authentication-bypass-via-customserver"},{"type":"PACKAGE","url":"https://github.com/phpmyadmin/phpmyadmin"},{"type":"ARTICLE","url":"https://github.com/phpmyadmin/phpmyadmin/blob/RELEASE_5_2_3/libraries/classes/WebAuthn/CustomServer.php#L76-L110"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-11-01T02:47:40.858113301Z"}}