CVE-2026-32254— Kube-router Proxy Module Blindly Trusts ExternalIPs/LoadBalancer IPs Enabling Cluster-Wide Traffic Hijacking and DNS DoS
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I. Basic Information for CVE-2026-32254
Vulnerability Information
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Vulnerability Title
Kube-router Proxy Module Blindly Trusts ExternalIPs/LoadBalancer IPs Enabling Cluster-Wide Traffic Hijacking and DNS DoS
Source: NVD (National Vulnerability Database)
Vulnerability Description
Kube-router is a turnkey solution for Kubernetes networking. Prior to version 2.8.0, Kube-router's proxy module does not validate externalIPs or loadBalancer IPs before programming them into the node's network configuration. Version 2.8.0 contains a patch for the issue. Available workarounds include enabling DenyServiceExternalIPs feature gate, deploying admission policy, restricting service creation RBAC, monitoring service changes, and applying BGP prefix filtering.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
访问控制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
kube-router 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
kube-router是CloudNative Labs开源的一个Kubernetes网络解决方案。 Kube-router 2.8.0之前版本存在安全漏洞，该漏洞源于代理模块未验证externalIPs或loadBalancer IPs，可能导致不当网络配置。
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 |
|---|---|---|---|---|
| cloudnativelabs | kube-router | < 2.8.0 | - |
II. Public POCs for CVE-2026-32254
| # | POC Description | Source Link | Shenlong Link |
|---|
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- Release v2.8.0 · cloudnativelabs/kube-router · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-32254
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V. Comments for CVE-2026-32254
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