High severityNVD Advisory· Published Mar 18, 2026· Updated Mar 18, 2026
Kube-router Proxy Module Blindly Trusts ExternalIPs/LoadBalancer IPs Enabling Cluster-Wide Traffic Hijacking and DNS DoS
CVE-2026-32254
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/cloudnativelabs/kube-router/v2Go | < 2.8.0 | 2.8.0 |
Affected products
3- ghsa-coords2 versionspkg:golang/github.com/cloudnativelabs/kube-router/v2pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2015.6
< 2.8.0+ 1 more
- (no CPE)range: < 2.8.0
- (no CPE)range: < 0.0.20260326T203309-150000.1.155.2
- cloudnativelabs/kube-routerv5Range: < 2.8.0
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-phqm-jgc3-qf8gghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-32254ghsaADVISORY
- github.com/cloudnativelabs/kube-router/commit/a1f0b2eea3ee0f66b9a5b5c49dcb714619ccd456ghsax_refsource_MISCWEB
- github.com/cloudnativelabs/kube-router/releases/tag/v2.8.0ghsax_refsource_MISCWEB
- github.com/cloudnativelabs/kube-router/security/advisories/GHSA-phqm-jgc3-qf8gghsax_refsource_CONFIRMWEB
News mentions
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