CVE-2026-32254

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

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.

Affected

cloudnativelabs · kube-router

CVSS v3.1 GITHUB

7.1 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

EPSS

0.46% chance of exploitation in the next 30 days, 39th percentile

Published

2026-03-18

Proof-of-concept exploits (1)

• advisories/GHSA-phqm-jgc3-qf8g

Security advisories

• cloudnativelabs/kube-router/security/advisories/GHSA-phqm-jgc3-qf8g
• cloudnativelabs/kube-router/commit/a1f0b2eea3ee0f66b9a5b5c49dcb714619ccd456

References

• CVE Record
• NVD entry