CVE-2026-55997

Summary

The flaw allows a malicious user to obtain long-lived registration tokens in plaintext, enabling them to register rogue nodes into the Rancher cluster at any time.

Exploitability

Exploitation is relatively easy given that tokens are stored in plaintext and can be accessed through various means such as the Rancher API, etcd, or direct file access.

Blast radius

If exploited, the impact could be severe, as it would allow unauthorized nodes to join the cluster, potentially leading to data breaches or unauthorized access.

Detection

No reliable host or network indicator is derivable from the published description.

Prioritized remediation

Disable the feature that generates long-lived registration tokens or upgrade to a version that addresses this vulnerability, such as 'Upgrade to 2.590 or later'.

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.