CVE-2026-32254

HIGH

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

Title source: cna
STIX 2.1

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.

References (3)

Scores

CVSS v3 7.1
EPSS 0.0006
EPSS Percentile 16.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-284
Status published
Products (3)
cloudnativelabs/kube-router 0 - 2.8.0Go
cloudnativelabs/kube-router < 2.8.0
kube-router/kube-router < 2.8.0
Published Mar 18, 2026
Tracked Since Mar 18, 2026