7.1

CVE-2026-32254: Kube-router Proxy Module Blindly Trusts ExternalIPs/LoadBalancer IPs Enabling Cluster-Wide Traffic Hijacking and DNS DoS

Analyzed
AliasesGHSA-phqm-jgc3-qf8gGO-2026-4724
Published 18-03-2026Last modified 18-03-2026

Vulnerability summary

CVE-2026-32254 is a high (CVSS 7.1) Improper Access Control vulnerability in cloudnativelabs kube-router. EPSS estimates a 0.31% chance of exploitation in the next 30 days, higher than 23.8% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Prioritisepublic exploit

Public exploit (GitHub, Date unknown)

Source freshness unavailable

How is this decided?
CVSS score
7.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.31%
0%100%
Low · -0.14 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2026:21483-1SUSE-SU-2026:1135-1

Timeline

  1. 18-03-2026
    PublishedVulnerability first disclosed.
  2. 18-03-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.31%

Chance of exploitation in the next 30 days

Percentile

24%

Versus all other CVEs

30-day change

Decrease -0.14 pp

From 0.45% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • githubUnverified

    Kube Router

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Cloudnativelabs1 product
Github.com/cloudnativelabs1 product
  • kube-routerAll versions (No fix recorded)
Github.com/cloudnativelabs/kube-router1 product
  • v2< 2.8.0
Kube-router1 product

4 vendors · 4 products

References

5 links