CVE-2026-71403
Last modified
CVE-2026-71403 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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. EPSS estimates a 0.20% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Suse | Rancher | < 2.15.1 |
References
- https://github.com/rancher/rancher/pull/56616Issue Tracking, Patch
Timeline
- Published
- Last Modified
- Status
- Analyzed
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