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CVE-2026-55997— Long-lived Rancher registration token exposed in plaintext

Quick assessment

Affected
rancher rancher
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Rancher是Rancher组织开源的一个面向企业环境的容器编排与管理平台。 Rancher 2.14.0版本至2.14.4之前版本和2.13.0版本至2.13.8之前版本存在加密问题漏洞，该漏洞源于Rancher向加入下游集群的节点和代理颁发长期有效的注册令牌，这些令牌以明文存储且无过期时间，可能被恶意用户通过Rancher API、etcd、存储自动化或节点直接文件访问获取，并用于注册恶意节点到集群中。

CVSS 8.8 · High EPSS 0.11% · P1

Affected Version Matrix 2

VendorProduct Version RangeStatus
rancher rancher 2.14.0< 2.14.4 affected
2.13.0< 2.13.8 affected
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I. Basic Information for CVE-2026-55997

Vulnerability Information
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Vulnerability Title
Long-lived Rancher registration token exposed in plaintext
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
敏感数据的明文存储
Source: CVE Program / CVE List V5
Vulnerability Title
Rancher 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rancher是Rancher组织开源的一个面向企业环境的容器编排与管理平台。 Rancher 2.14.0版本至2.14.4之前版本和2.13.0版本至2.13.8之前版本存在加密问题漏洞，该漏洞源于Rancher向加入下游集群的节点和代理颁发长期有效的注册令牌，这些令牌以明文存储且无过期时间，可能被恶意用户通过Rancher API、etcd、存储自动化或节点直接文件访问获取，并用于注册恶意节点到集群中。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
rancher rancher 2.14.0 ~ 2.14.4 -

II. Public POCs for CVE-2026-55997

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8658 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-55997

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Vendor Advisories for CVE-2026-55997 (1)

IV. Related Vulnerabilities

Same product: rancher
Same vendor: rancher
Same weakness: CWE-312

V. Comments for CVE-2026-55997

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