{"id":"CVE-2026-71403","summary":"Rancher: Identity-field mutation in /v3/users allows account hijack via principal rebind","details":"A flaw was found in Rancher Manager. The /v3/users update path did not enforce immutability of a User resource's `username` and `principalIds` fields. A user holding the `update` verb on `users.management.cattle.io` could inject a foreign identity provider principal into any account, so that the next login by the owner of that principal was bound to the victim's account and inherited its role bindings.\n\n\nThis issue affects Rancher: before 2.15.1.","modified":"2026-09-05T03:48:04.707402148Z","published":"2026-09-03T14:45:37.468Z","database_specific":{"cna_assigner":"suse","cwe_ids":["CWE-639"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71403.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71403.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71403"},{"type":"FIX","url":"https://github.com/rancher/rancher/pull/56616"},{"type":"PACKAGE","url":"https://github.com/rancher/rancher"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/rancher/rancher","events":[{"introduced":"0"},{"fixed":"8c257d748d23d4812092e28cc92b2a6f3e4dd594"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.15.1"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["v2.15.1-rc2","v2.15.1-rc1","v2.15.1-alpha1","v2.15.0","v2.15.0-rc5","v2.15.0-rc4","v2.15.0-rc3","v2.15.0-rc2","v2.15.0-rc1","v2.15.0-alpha22","v2.15.0-alpha19","v2.15.0-alpha18","v2.15.0-alpha17","v2.15.0-alpha16","v2.15.0-alpha15","v2.15.0-alpha14","v2.15.0-alpha13","v2.15.0-alpha12","v2.15.0-alpha11","v2.15.0-alpha10","v2.15.0-alpha9","v2.15.0-alpha8","v2.15.0-alpha7","v2.15.0-alpha6","v2.15.0-alpha5","v2.15.0-alpha4","v2.15.0-alpha3","v2.15.0-alpha2","v2.15.0-alpha1","v2.14.0-alpha10","v2.14.0-alpha9","v2.14.0-alpha8","v2.14.0-alpha7","v2.14.0-alpha6","v2.14.0-alpha5","v2.14.0-alpha4","v2.14.0-alpha3","v2.14.0-alpha2","v2.14.0-alpha1","v2.13.0-alpha6","v2.13.0-alpha5","v2.13.0-alpha4","v2.13.0-alpha3","v2.13.0-alpha2","v2.13.0-alpha1","v2.12.0-alpha20","v2.12.0-alpha19","v2.12.0-alpha18","v2.12.0-alpha17","v2.12.0-alpha16","v2.12.0-alpha15","v2.12.0-alpha14","v2.12.0-alpha13","v2.12.0-alpha12","v2.12.0-rc1","v2.12.0-alpha11","v2.12.0-alpha10","v2.12.0-alpha9","v2.12.0-alpha8","v2.12.0-alpha7","v2.12.0-alpha6","v2.12.0-alpha5","v2.12.0-alpha4","v2.12.0-alpha3","v2.12.0-alpha2","v2.12.0-alpha1","v2.12.0-hotfix-b112.1","v2.11.0-alpha13","v2.11.0-alpha12","v2.11.0-alpha11","v2.11.0-alpha10","v2.11.0-alpha9","v2.11.0-alpha8","v2.11.0-alpha7","v2.11.0-alpha6","v2.11.0-alpha5","v2.11.0-alpha4","v2.11.0-alpha3","v2.11.0-alpha2","v2.11.0-alpha1","v2.10.0-alpha10","v2.10.0-alpha9","v2.10.0-alpha8","v2.10.0-alpha7","v2.10.0-alpha6","v2.10.0-alpha5","v2.10.0-alpha4","v2.10.0-alpha3","v2.10.0-alpha2","v2.10.0-alpha1","v2.9.0-rc6","v2.9.0","v2.9.0-rc5","v2.9.0-rc4","v2.9.0-rc3","v2.9.0-alpha8","v2.9.0-rc2","v2.9.0-alpha7","v2.9.0-alpha6","v2.9.0-alpha5","v2.9.0-alpha4","v2.9.0-alpha3","v2.9.0-alpha2","v2.9.0-rc1","v2.9.0-alpha1","v2.7.5","v2.8.0-rc5","v2.8.0","v2.8.0-rc4","v2.8.0-rc3","v2.8.0-rc2","v2.8.0-rc1","v2.8.0-alpha2","v2.8.0-alpha1","v2.7.7-rc2","v2.7.7-rc1","v2.7.5-rc6","v2.7.5-rc5","v2.7.5-rc4","v2.7.5-rc3","v2.7.5-rc2","v2.7.5-rc1","v2.7.2-rc9","v2.7.2-rc10","v2.7.2","v2.7.2-rc8","v2.7.2-rc7","v2.7.2-rc6","v2.7.2-rc5","v2.7.2-rc4","v2.7.2-rc3","v2.7.2-rc2","v2.7.0-novkdm","v2.7.0","v2.7.2-rc1","v2.7.0-rc9","v2.7.0-rc12","v2.7.0-rc11","v2.7.0-rc10","v2.7.0-rc8","v2.7.0-rc7","v2.7.0-rc6","v2.7.0-rc5","v2.7.0-rc4","v2.7.0-rc3","v2.7.0-rc2","v2.7.0-rc1","v2.6.7-rc10","v2.6.7","v2.6.7-rc7","v2.6.8-rc3","v2.6.8-rc2","v2.6.7-rc9","v2.6.7-rc8","v2.6.7-rc6","v2.6.7-rc5","v2.6.7-rc4","v2.6.7-rc3","v2.6.7-rc2","v2.6.7-rc1","v2.6.5-rc12","v2.6.5","v2.6.6-rc1","v2.6.5-rc11","v2.6.5-rc10","v2.6.5-rc9","v2.6.5-rc8","v2.6.5-rc6","v2.6.5-rc5","v2.6.5-rc4","v2.6.5-rc3","v2.6.5-rc2","v2.6.4-rc11","v2.6.5-rc1","v2.6.4-rc13","v2.6.4-rc12","v2.6.4-rc10","v2.6.4-rc9","v2.6.4-rc8","v2.6.4-rc5","v2.6.4-rc6","v2.6.4-rc4","v2.6.4-rc3","v2.6.4-rc2","v2.6.4-rc1","v2.6.4-alpha3","v2.6.4-alpha2","v2.6.5-alpha1","v2.6.4-alpha1","v2.6.3-rc11","v2.6.3-harvester1","v2.6.3","v2.6.3-rc10","v2.6.3-rc9","v2.6.3-rc8","v2.6.3-rc7","v2.6.3-rc6","v2.6.3-rc5","v2.6.3-rc4","v2.6.3-rc3","v2.6.3-rc2","v2.6.3-rc1","v2.6.1-rc13","v2.6.1-harvester2","v2.6.1","v2.6.1-rc12","v2.6.1-harvester1","v2.6.1-rc11","v2.6.1-rc9","v2.6.1-rc10","v2.6.1-rc2","v2.6.1-rc8","v2.6.1-rc7","v2.6.1-rc6","v2.6.1-rc5","v2.6.1-rc4","v2.6.1-rc3","v2.6.1-rc1","v2.6.0-rc10","v2.6.0","v2.6.0-rc9","v2.6.0-rc8","v2.6.0-rc7","v2.6.0-rc6","v2.6.0-rc5","v2.6.0-rc4","v2.6.0-rc3","v2.6.0-rc2","v2.6.0-rc1","v2.4.0-rc9","v2.5.0-rc4","v2.5.0-rc3","v2.5.0-rc2","v2.5.0-rc1","v2.5.0-alpha5","v2.5.0-alpha4","v2.5.0-alpha3","v2.5.0-alpha2","v2.5.0-alpha1","v2.3.7-draft","v2.4.0-rc11","v2.4.0-rc10","v2.4.0-rc8","v2.4.0-rc7","v2.4.0-rc6","v2.4.0-rc5","v2.4.0-rc4","v2.4.0-rc3","v2.4.0-rc2","v2.4.0-rc1","v2.4.0-alpha1","v2.3.0-rc10","v2.3.0-rc9","v2.3.0-rc8","v2.3.0-rc7","v2.3.0-rc6","v2.3.0-rc5","v2.3.0-rc4","v2.3.0-rc3","v2.3.0-rc2","v2.3.0-rc1","v2.3.0-alpha7","v2.3.0-alpha6","v2.3.0-alpha5","v2.3.0-alpha4","v2.2.0-rc15","v2.2.0","v2.2.0-rc14","v2.2.0-rc13","v2.2.0-rc12","v2.2.0-rc11","v2.2.0-rc10","v2.2.0-rc9","v2.2.0-rc8","v2.2.0-rc7","v2.2.0-rc6","v2.2.0-rc5","v2.2.0-rc4","v2.2.0-rc3","v2.2.0-rc2","v2.2.0-rc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