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CVE-2026-32254— Kube-router Proxy Module Blindly Trusts ExternalIPs/LoadBalancer IPs Enabling Cluster-Wide Traffic Hijacking and DNS DoS

Quick assessment

Affected
cloudnativelabs kube-router
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.

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。

CVSS 7.1 · High EPSS 0.45% · P37

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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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: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
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
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7045 chars
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III. Intelligence Information for CVE-2026-32254

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Patches & Fixes for CVE-2026-32254 (1)

Vendor Advisories for CVE-2026-32254 (1)

Vendor Pages for CVE-2026-32254 (1)

IV. Related Vulnerabilities

Same weakness: CWE-284

V. Comments for CVE-2026-32254

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