AUGUST 16, 2026
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Case File

CVE-2026-55997

HIGH · CVSS 8.8 EPSS 0.08% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-05 · Last synced 2026-08-16

CyberRota Analysis

AI-Generated

Rancher’s long-lived registration tokens, which are used for authenticating nodes and agents in downstream clusters, are vulnerable due to being stored in plaintext without expiration. This allows an attacker to potentially access these tokens through various means, such as the Rancher API or direct file access, enabling them to register unauthorized nodes within the cluster. Organizations using Rancher should prioritize addressing this vulnerability to prevent unauthorized access and potential compromise of their cluster environments.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-55997
Severity
HIGH
CVSS
8.8
EPSS
0.08%

Original NVD 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.