CVE-2026-32254Public exploitNetwork attack vector

Traffic redirection and DNS outage via unvalidated IPs

Published Mar 18, 2026 · Updated Mar 18, 2026

Improper access control in CloudNative Labs kube-router before 2.8.0 allows remote authenticated users to redirect cluster traffic via Service objects. The proxy module's buildServicesInfo function copies Service.spec.externalIPs and load-balancer ingress IPs into IPVS and node routes without enforcing configured ranges or detecting ClusterIP conflicts. Namespace-scoped Service creation or update permission is sufficient to replace endpoints for a targeted IP, protocol, and port, enabling traffic redirection or a cluster-wide DNS outage.

CVSS severity6.5
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper access control in CloudNative Labs kube-router before 2.8.0 allows remote authenticated users to redirect cluster traffic via Service objects. The proxy module's buildServicesInfo function copies Service.spec.externalIPs and load-balancer ingress IPs into IPVS and node routes without enforcing configured ranges or detecting ClusterIP conflicts. Namespace-scoped Service creation or update permission is sufficient to replace endpoints for a targeted IP, protocol, and port, enabling traffic redirection or a cluster-wide DNS outage.

The record

CVE
CVE-2026-32254
Published
Mar 18, 2026
Updated
Mar 18, 2026
Vendor
CloudNative Labs
Product
kube-router
Classifications
CWE-284, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

CloudNative Labs · kube-routerversion=< 2.8.0

Published CVSS scores

6.5GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
T1565.001Stored Data Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo