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CVE-2026-71403

🗓️ 03 Sep 2026 14:45:37Reported by suseType 
cve
 cve
🔗 web.nvd.nist.gov👁 33 Views🌐 WEB

Account hijack in Rancher before 2.15.1 via identity-field mutation in /v3/users update path.

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Detection
Affected
Refs
Paths
NVD
Vulners
Node
suserancherRange<2.15.1
[
  {
    "vendor": "SUSE",
    "product": "Rancher",
    "repo": "https://github.com/rancher/rancher",
    "modules": [
      "Manager"
    ],
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "2.15.1",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected"
  }
]
ParameterPositionPathDescriptionCWE
usernamerequest body/v3/usersA flaw in Rancher Manager where the /v3/users update path does not enforce immutability of a User resource's username and principalIds, allowing an attacker with update permissions on users.management.cattle.io to inject a foreign identity provider principal into a user account, causing the owner's next login to be bound to the victim's account and inherit its role bindings.CWE-639
principalIdsrequest body/v3/usersA flaw in Rancher Manager where the /v3/users update path does not enforce immutability of a User resource's username and principalIds, allowing an attacker with update permissions on users.management.cattle.io to inject a foreign identity provider principal into a user account, causing the owner's next login to be bound to the victim's account and inherit its role bindings.CWE-639

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18 Sep 2026 15:03Current
5.7Medium risk
Vulners AI Score5.7
CVSS 3.16.1
EPSS0.00369
SSVC
33