Upstream information

CVE-2026-55997 at MITRE

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.

Upstream Security Advisories:

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v3 Scores
CVSS detail CNA (SUSE)
Base Score 8.8
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality Impact High
Integrity Impact High
Availability Impact High
CVSSv3 Version 3.1
SUSE Bugzilla entry: 1268804 [RESOLVED / FIXED]

SUSE Security Advisories:

SUSE Timeline for this CVE

CVE page created: Fri Jul 31 14:11:06 2026
CVE page last modified: Wed Aug 12 19:39:04 2026