CVE-2026-75035: Rancher: ext.cattle.io/v1 Token store: cross-user token disclosure via label-selector scoping bypass
A flaw was found in Rancher Manager. When a non-administrative caller supplied a label selector naming a different user, the ext.cattle.io/v1 Token store dropped its internal owner filter instead of returning an empty result. Any authenticated user could therefore list and watch every other user's tokens, disclosing token metadata and the stored salted hash of the bearer token.
This issue affects Rancher: before 2.15.1.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
Any authenticated non-administrative Rancher user can exploit it. The attacker does not need administrator privileges or user interaction.
What information can be exposed?
An attacker can list and watch other users' tokens through the ext.cattle.io/v1 Token store. Exposed data includes token metadata and the stored salted hash of the bearer token.
What request condition triggers the disclosure?
The caller supplies a label selector that names a different user. In the affected versions, this causes the internal owner filter to be dropped rather than returning no results.
Are deployments affected by default?
The issue affects Rancher Manager versions before 2.15.1 when authenticated non-administrative users can access the affected Token store endpoint. No additional configuration requirement is stated.
How can I determine whether an instance is affected?
Check the Rancher version: versions before 2.15.1 are affected. You can also review Token store list or watch requests from non-administrative users for label selectors referring to a different user.