Vulnerability in Cloudnativelabs Kube-Router
CVE-2026-32254
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.
EPSS: 0.003 (22.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H.
Affected products
- Cloudnativelabs Kube-router — versions < 2.8.0
- Kube-router
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Patch, Mitigation, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-32254?
- CVE-2026-32254 is a high-severity vulnerability in Cloudnativelabs Kube-Router, classified under Improper Access Control. CVSS score: 7.1/10. Published 2026-03-18.
- How severe is CVE-2026-32254?
- High severity. CVSS v3 base score is 7.1 out of 10.