6.1

CVE-2026-71403

Rancher: Identity-field mutation in /v3/users allows account hijack via principal rebind

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Suse ≫ Rancher Version < 2.15.1
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.2% 0.094
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 6.1 0.9 5.2
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N
SUSE 6.1 0.9 5.2
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N
CWE-639 Authorization Bypass Through User-Controlled Key

The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

https://github.com/rancher/rancher/pull/56616
Patch
Issue Tracking