{"schema":"threatline.record/2","record":{"id":"CVE-2026-105210","aliases":["GHSA-72q5-mv5c-vxv4"],"summary":"ZITADEL before 4.17.1 Unauthenticated MFA Enrollment via Login V1 Init Handlers","details":"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.","categories":["Unclassified"],"product":"zitadel","vendor":"zitadel","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-105210","source_modified_at":"2026-10-05T13:29:17.102Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"zitadel","vendor":"zitadel","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"4.17.1"},{"version":"4.17.1","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-105210","source_modified_at":"2026-10-05T13:29:17.102Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"zitadel","vendor":"zitadel","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"3.4.15"},{"version":"3.4.15","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-105210","source_modified_at":"2026-10-05T13:29:17.102Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"zitadel","ecosystem":null},"version":"4.17.1","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-105210","source_modified_at":"2026-10-05T13:29:17.102Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"zitadel","ecosystem":null},"version":"3.4.15","basis":"first unaffected version stated in the CVE record"}],"cvss":8.8,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00236,"percentile":0.13794,"score_date":"2026-10-23"},"published_at":"2026-10-04T13:10:03.949Z","modified_at":"2026-10-05T13:29:17.102Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-105210","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-05T13:29:17.102Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-105210","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/zitadel/zitadel/security/advisories/GHSA-72q5-mv5c-vxv4","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/zitadel-before-4.17.1-unauthenticated-mfa-enrollment-via-login-v1-init-handlers","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-05T13:29:04.590483Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-05T13:29:17.102Z","content_hash":"e45fcd6910db7ec237e90543a1879c93be5d30cc9ad10e24ed4627a4b3c76d4a"}}