CVE-2026-55997
High
Description
Rancher issues long-lived registration tokens to authenticate nodes and agents joining a downstream cluster. These tokens were stored and exposed in plaintext with no expiration, so a malicious user could obtain one either through the Rancher API, etcd, stored automation, or direct file access on a node, and could use it at any time to register a rogue node into the cluster.
SeverityHigh
CVSS8.8
Exploit probability—
ProductRancher
PublishedAug 5, 2026
First seenAug 5, 2026
Weakness typeCWE-312CWE-312
How to fix
Update
- rancher rancher2.14.4, 2.13.8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| rancher rancher | 2.14.0 ≤ v < 2.14.4, 2.13.0 ≤ v < 2.13.8 | 2.14.4, 2.13.8 |
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