{"id":"CVE-2026-119561","aliases":[],"cve":{"records":[{"id":"CVE-2026-119561","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-30T10:53:30.067Z","published":"2026-10-30T11:31:09.654Z","modified":"2026-10-30T16:21:29.456Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-10-30T11:31:09.654Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-30T16:21:29.456Z"}],"references":[{"url":"https://github.com/phpmyadmin/phpmyadmin/blob/RELEASE_5_2_3/libraries/classes/WebAuthn/CustomServer.php#L76-L110","tags":["technical-description"],"source":"VulnCheck"},{"url":"https://abraxaslabs.tech/research/PMA-5.2.3-WebAuthn-2FA","tags":["third-party-advisory"],"source":"VulnCheck"},{"url":"https://abraxaslabs.tech/research/phpmyadmin-webauthn","tags":["third-party-advisory"],"source":"VulnCheck"},{"url":"https://github.com/phpmyadmin/phpmyadmin","tags":["product"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/phpmyadmin-through-5.2.3-webauthn-two-factor-authentication-bypass-via-customserver","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-347","description":"Improper Verification of Cryptographic Signature","source":"VulnCheck"}],"applicability":[{"source":"VulnCheck","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:phpmyadmin:phpmyadmin:*:*:*:*:*:*:*:*","versionEndIncluding":"5.2.3"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-30T16:21:10.400395Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"total"}]}]},"title":"phpMyAdmin through 5.2.3 WebAuthn Two-Factor Authentication Bypass via CustomServer","titleSource":"VulnCheck","descriptionSource":"VulnCheck","description":"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.","score":7.6,"severity":"high","published":"2026-10-30T11:31:09.654Z","modified":"2026-10-30T16:21:29.456Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"phpMyAdmin","name":"phpMyAdmin","platforms":[],"versions":[{"version":"0","status":"affected","lessThanOrEqual":"5.2.3","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:composer/phpmyadmin/phpmyadmin","packageIdentity":{"ecosystem":"Packagist","name":"phpmyadmin/phpmyadmin"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-119561"}],"remediation":[],"references":["https://github.com/phpmyadmin/phpmyadmin/blob/RELEASE_5_2_3/libraries/classes/WebAuthn/CustomServer.php#L76-L110","https://abraxaslabs.tech/research/PMA-5.2.3-WebAuthn-2FA","https://abraxaslabs.tech/research/phpmyadmin-webauthn","https://github.com/phpmyadmin/phpmyadmin","https://www.vulncheck.com/advisories/phpmyadmin-through-5.2.3-webauthn-two-factor-authentication-bypass-via-customserver"],"sources":[{"name":"CVE","id":"CVE-2026-119561","modified":"2026-10-30T16:21:29.456Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-119561"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","score":7.6},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","score":6.8}],"sourceAffected":[],"observedAt":"2026-10-30T17:27:05.873Z","kev":{"status":"not-listed","checkedAt":"2026-10-30T22:45:31.166Z"},"coverage":[{"source":"NVD","status":"no-result","checkedAt":"2026-10-30T12:00:44.174Z","attemptedAt":"2026-10-30T12:00:44.174Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-10-30T12:00:36.880Z","attemptedAt":"2026-10-30T12:00:36.880Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-30T12:00:36.656Z","attemptedAt":"2026-10-30T12:00:36.656Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-10-30T12:00:36.648Z","attemptedAt":"2026-10-30T12:00:36.648Z"}],"evidence":[{"source":"ENISA EUVD","id":"EUVD-2026-113826","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-113826","modified":"Oct 30, 2026, 11:31:09 AM","score":7.6,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","checkedAt":"2026-10-30T12:00:36.656Z"}],"aiSummary":{"text":"phpMyAdmin through 5.2.3 has an authentication bypass vulnerability. Attackers with MySQL credentials can bypass two-factor authentication by posting a crafted request. This is due to a weakness in verifying WebAuthn assertion signatures.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T11:41:31.487Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-119561"}]}}