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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (36.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Cloudnativelabs Kube-Router — versions < 2.8.0
- Kube-Router
Weakness classification (CWE)
References
- github.com/cloudnativelabs/kube-router/security/advisories/GHSA-phqm-jgc3-qf8g (Exploit, Patch, Mitigation, Vendor Advisory)
- github.com/cloudnativelabs/kube-router/commit/a1f0b2eea3ee0f66b9a5b5c49dcb71461… (Patch)
- github.com/cloudnativelabs/kube-router/releases/tag/v2.8.0 (Product, 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.