{"id":"CVE-2026-105211","revision":"64f50895aec246a0a3dc8ba1d172d6fb","records":[{"revision":"64f50895aec246a0a3dc8ba1d172d6fb","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-105211","aliases":[],"title":"ZITADEL before 4.17.1 Authentication Bypass via Login V2 OTP returnCode","description":"ZITADEL before 4.17.1 contains an authentication bypass vulnerability in Login V2 that allows unauthenticated attackers to take over accounts by obtaining OTP codes via the returnCode delivery type. Attackers knowing a login name of a victim with OTP-Email and OTP-SMS enrolled can read both codes from server-action responses to gain MFA-authenticated sessions, including administrator takeover.","state":0,"publishedAt":"2026-10-04T13:10:04.626+00:00","modifiedAt":"2026-10-05T14:06:56.95+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\": \"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                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":9.2,"severity":"CRITICAL"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.1,"severity":"HIGH"}],"references":["https://github.com/zitadel/zitadel/security/advisories/GHSA-3gwm-5wx8-4gm6","https://www.vulncheck.com/advisories/zitadel-before-4.17.1-authentication-bypass-via-login-v2-otp-returncode"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-105211","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-105211","identifiers":["CVE-2026-105211"]},"retained":false,"historicalAffected":[]}],"coverage":[]}