{"id":"CVE-2026-105210","revision":"9529af291f1e41039776759da73916fd","records":[{"revision":"9529af291f1e41039776759da73916fd","observedAt":"2026-10-29T21:48:56.968+00:00","statement":{"source":"cve-program","id":"CVE-2026-105210","aliases":[],"title":"ZITADEL before 4.17.1 Unauthenticated MFA Enrollment via Login V1 Init Handlers","description":"ZITADEL 3.x before 3.4.15 and 4.x before 4.17.1 contains a missing authentication flaw in the hosted Login V1 UI, whose second-factor enrollment and initialization handlers act on an identify-only session before any primary factor is verified. Attackers knowing only a victim's login name can enroll attacker-controlled TOTP, OTP-SMS, OTP-Email, or U2F factors, overwrite the verified phone number, and enumerate users through discrepant errors.","state":0,"publishedAt":"2026-10-04T13:10:03.949+00:00","modifiedAt":"2026-10-29T20:19:20.299+00:00","affected":[{"ecosystem":"Vendor product","name":"zitadel","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"zitadel\",\n                    \"product\": \"zitadel\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"4.0.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"4.17.1\"\n                        },\n                        {\n                            \"version\": \"4.17.1\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"zitadel","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"zitadel\",\n                    \"product\": \"zitadel\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"3.4.15\"\n                        },\n                        {\n                            \"version\": \"3.4.15\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N","score":8.8,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N","score":8.2,"severity":"HIGH"}],"references":["https://github.com/zitadel/zitadel/security/advisories/GHSA-72q5-mv5c-vxv4","https://www.vulncheck.com/advisories/zitadel-before-4.17.1-unauthenticated-mfa-enrollment-via-login-v1-init-handlers"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-105210","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-105210","identifiers":["CVE-2026-105210"]},"retained":false,"historicalAffected":[]}],"coverage":[]}