{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-85056","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-09-02T21:21:01.774Z","datePublished":"2026-09-24T17:34:13.328Z","dateUpdated":"2026-09-28T14:56:04.082Z"},"containers":{"cna":{"title":"ZITADEL: MFA bypass via session reuse in Login V2","problemTypes":[{"descriptions":[{"cweId":"CWE-287","lang":"en","description":"CWE-287: Improper Authentication","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/zitadel/zitadel/security/advisories/GHSA-9993-rfwp-rhwf","tags":["x_refsource_CONFIRM"],"url":"https://github.com/zitadel/zitadel/security/advisories/GHSA-9993-rfwp-rhwf"},{"name":"https://github.com/zitadel/zitadel/commit/049dbb25a56587fb3980c85c99819cad69f637db","tags":["x_refsource_MISC"],"url":"https://github.com/zitadel/zitadel/commit/049dbb25a56587fb3980c85c99819cad69f637db"},{"name":"https://github.com/zitadel/zitadel/commit/56f4798ed31fc1cfcd9a0e7f6f0152289d2fdc43","tags":["x_refsource_MISC"],"url":"https://github.com/zitadel/zitadel/commit/56f4798ed31fc1cfcd9a0e7f6f0152289d2fdc43"},{"name":"https://github.com/zitadel/zitadel/releases/tag/v4.16.1","tags":["x_refsource_MISC"],"url":"https://github.com/zitadel/zitadel/releases/tag/v4.16.1"}],"affected":[{"vendor":"zitadel","product":"zitadel","versions":[{"version":">= 4.0.0, < 4.16.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-24T17:34:13.328Z"},"descriptions":[{"lang":"en","value":"ZITADEL is an open source identity management platform. From 4.0.0 until 4.16.1, ZITADEL Login V2 creates a browser session after password verification and can reuse that session for a later authentication request without verifying a user's enrolled TOTP, OTP, or U2F second factor. When the MFA step is abandoned and login starts again, session-validity checks require MFA only when the organization enables Force MFA or Force MFA for local users only, so a voluntarily enrolled factor can be skipped while completing an OIDC or SAML callback for a customer application. Login V1, the ZITADEL Console, Management and Admin APIs, and user self-management are not affected. This issue is fixed in version 4.16.1."}],"source":{"advisory":"GHSA-9993-rfwp-rhwf","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-28T14:55:51.988985Z","id":"CVE-2026-85056","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-28T14:56:04.082Z"}}]}}