Upstream information

CVE-2026-71403 at MITRE

Description

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.


This issue affects Rancher: before 2.15.1.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v3 Scores
CVSS detail CNA (SUSE)
Base Score 6.1
Vector CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required High
User Interaction Required
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact None
CVSSv3 Version 3.1
SUSE Bugzilla entry: 1275308 [NEW]

SUSE Security Advisories:

SUSE Timeline for this CVE

CVE page created: Fri Aug 28 11:42:08 2026
CVE page last modified: Thu Sep 3 20:53:31 2026