CVE-2026-55997

Long-lived Rancher registration token exposed in plaintext

Published Aug 5, 2026 CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Rancher
Rancher rancher
Vendors & Products Rancher
Rancher rancher
Type Values Removed Values Added
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.
Title Long-lived Rancher registration token exposed in plaintext
Weaknesses CWE-312
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
suse
Published
Updated
Aug 6, 2026, 3:55 AM
Reserved
Jun 18, 2026, 9:26 AM
Status
Awaiting Analysis
Published
Aug 5, 2026, 8:16 AM
Modified
Sep 1, 2026, 8:54 PM