{"schema_version":"1.9.0","id":"CVE-2026-23511","published":"2026-01-15T19:09:06.154Z","modified":"2026-08-12T03:51:31.497961099Z","aliases":["GHSA-pvm5-9frx-264r","GO-2026-4319"],"related":["SUSE-SU-2026:0292-1","openSUSE-SU-2026:21483-1"],"summary":"ZITADEL has a user enumeration vulnerability in Login UIs","details":"ZITADEL is an open source identity management platform. Prior to 4.9.1 and 3.4.6, a user enumeration vulnerability has been discovered in Zitadel's login interfaces. An unauthenticated attacker can exploit this flaw to confirm the existence of valid user accounts by iterating through usernames and userIDs. This vulnerability is fixed in 4.9.1 and 3.4.6.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/zitadel/zitadel","events":[{"introduced":"5b284f8c9ba65a88fb4d58ac6aa34be429b19e8e"},{"last_affected":"85122bd18b310ea8d6578c07e1cf07698ee28055"},{"introduced":"573c96d6af6aa8778efd9bff59f9bc0dab94c495"},{"fixed":"afe594c3498d9e4c67039f0b3b18e799dcbdb07b"},{"introduced":"c86c60bab86b64b44755d2776703939c01686055"},{"fixed":"d08f14c513715676195d5d671b5b65664abd5759"},{"fixed":"b85ab69e4679b0268e2b0e9b4cd04e934af10dd2"},{"fixed":"c300d4cc6a2775ab17ddfe76492f24170f8b858d"}],"database_specific":{"cpe":"cpe:2.3:a:zitadel:zitadel:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"2.0.0"},{"last_affected":"2.71.19"},{"introduced":"3.0.0"},{"fixed":"3.4.6"},{"introduced":"4.0.0"},{"fixed":"4.9.1"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["v4.9.0","v3.4.5","v4.8.1","v4.8.0","v4.7.6","v4.7.5","v4.7.4","v4.7.3","v4.7.2","v3.4.4","v4.7.1","v4.7.0","v4.6.6","v2.71.19","v4.6.5","v2.71.18","v3.4.3","v4.6.4","v4.6.3","v4.6.2","v4.6.1","v4.6.0","v2.71.17","v3.4.2","v4.5.0","v4.4.0","v4.3.3","v4.3.2","v4.3.1","v4.3.0","v4.2.2","v4.2.1","v2.71.16","v4.2.0","v4.1.4","v4.1.3","v3.4.1","v4.1.2","v4.1.1","v4.1.0","v3.4.0","v2.71.15","v4.0.3","v4.0.2","v3.3.6","v4.0.1","v2.71.14","v3.3.5","v3.3.4","v3.3.3","v3.3.2","v4.0.0","v2.71.13","v2.71.12","v3.3.1","v3.3.0","v3.2.3","v3.2.2","v2.71.11","v3.2.1","v3.2.0","v3.1.0","v3.0.4","v2.71.10","v3.0.3","v2.71.9","v3.0.2","v3.0.1","v3.0.0","v2.71.8","v2.71.7","v2.71.6","v2.71.5","v2.71.4","v2.71.3","v2.71.2","v2.71.1","v2.70.1","v2.71.0","v2.70.0","v2.69.3","v2.69.2","v2.69.1","v2.69.0","v2.68.1","v2.67.4","v2.68.0","v2.67.3","v2.67.2","v2.67.1","v2.67.0","v2.66.3","v2.66.2","v2.66.1","v2.66.0","v2.65.4","v2.65.3","v2.65.2","v2.65.1","v2.65.0","v2.64.1","v2.64.0","v2.63.4","v2.63.3","v2.63.2","v2.63.1","v2.63.0","v2.62.3","v2.62.2","v2.62.1","v2.62.0","v2.61.0","v2.59.1","v2.60.0","v2.58.3","v2.59.0","v2.58.2","v2.58.1","v2.56.1","v2.58.0","v2.57.0","v2.56.0","v2.55.2","v2.55.1","v2.55.0","v2.54.3","v2.54.2","v2.54.1","v2.54.0","v2.53.2","v2.53.1","v2.52.1","v2.53.0","v2.52.0","v2.51.4","v2.51.3","v2.51.2","v2.50.5","v2.51.1","v2.51.0","v2.50.4","v2.50.3","v2.50.2","v2.49.3","v2.48.3","v2.50.1","v2.50.0","v2.49.2","v2.49.1","v2.49.0","v2.48.2","v2.48.1","v2.47.6","v2.48.0","v2.47.5","v2.47.4","v2.47.3","v2.47.2","v2.46.0","v2.45.0","v2.44.2","v2.47.1","v2.47.0","v2.44.1","v2.44.0","v2.43.5","v2.43.4","v2.43.3","v2.43.2","v2.43.1","v2.43.0","v2.42.3","v2.42.2","v2.42.1","v2.42.0","v2.41.5","v2.41.4","v2.41.3","v2.41.2","v2.40.5","v2.41.1","v2.41.0","v2.40.4","v2.40.3","v2.39.3","v2.40.2","v2.40.1","v2.40.0","v2.39.2","v2.38.1","v2.39.1","v2.39.0","v2.38.0","v2.37.3","v2.37.2","v2.37.1","v2.37.0","v2.36.3","v2.36.2","v2.36.1","v2.36.0","v2.35.1","v2.35.0","v2.34.1","v2.32.0","v2.34.0","v2.33.1","v2.33.0","v2.31.5","v2.31.4","v2.31.3","v2.31.2","v2.31.1","v2.31.0","v2.30.0","v2.29.3","v2.29.2","v2.29.1","v2.29.0","v2.28.1","v2.27.1","v2.28.0","v2.27.0","v2.26.2","v2.26.1","v2.26.0","v2.25.3","v2.25.2","v2.25.1","v2.25.0","v2.24.0","v2.23.1","v2.23.0","v2.22.2","v2.22.1","v2.22.0","v2.21.0","v2.20.0","2.20.0","v2.19.0","v2.18.0","v2.17.1","v2.17.0","v2.16.1","v2.16.0","v2.15.0","v2.14.5","v2.14.4","v2.14.3","v2.14.2","v2.14.1","v2.14.0","v2.13.1","v2.13.0","v2.12.0","v2.11.1","v2.11.0","v2.8.2","v2.10.0","v2.9.1","v2.9.0","v2.8.1","v2.8.0","v2.7.0","v2.6.0","v2.5.1","v2.5.0","v2.4.0","v2.3.4","v2.3.3","v2.3.2","v2.3.1","v2.3.0","v2.2.0","v2.1.1","v2.1.0","v2.0.1","v2.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23511.json"}}],"references":[{"type":"WEB","url":"https://github.com/zitadel/zitadel/releases/tag/v3.4.6"},{"type":"WEB","url":"https://github.com/zitadel/zitadel/releases/tag/v4.9.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23511.json"},{"type":"ADVISORY","url":"https://github.com/zitadel/zitadel/security/advisories/GHSA-pvm5-9frx-264r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23511"},{"type":"FIX","url":"https://github.com/zitadel/zitadel/commit/b85ab69e4679b0268e2b0e9b4cd04e934af10dd2"},{"type":"FIX","url":"https://github.com/zitadel/zitadel/commit/c300d4cc6a2775ab17ddfe76492f24170f8b858d"}],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-204"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23511.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}