CVE-2026-32254
Kube-router Proxy Module Blindly Trusts ExternalIPs/LoadBalancer IPs Enabling Cluster-Wide Traffic Hijacking and DNS DoS
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.
INFO
Published Date :
March 18, 2026, 4:17 a.m.
Last Modified :
March 19, 2026, 6:06 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Kube-router to version 2.8.0 or later.
- Enable DenyServiceExternalIPs feature gate.
- Deploy admission policy.
- Restrict service creation RBAC.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-32254.
| URL | Resource |
|---|---|
| https://github.com/cloudnativelabs/kube-router/commit/a1f0b2eea3ee0f66b9a5b5c49dcb714619ccd456 | Patch |
| https://github.com/cloudnativelabs/kube-router/releases/tag/v2.8.0 | Product Release Notes |
| https://github.com/cloudnativelabs/kube-router/security/advisories/GHSA-phqm-jgc3-qf8g | Exploit Mitigation Patch Vendor Advisory |
| https://github.com/cloudnativelabs/kube-router/security/advisories/GHSA-phqm-jgc3-qf8g | Exploit Mitigation Patch Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-32254 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-32254
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-32254 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-32254 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 19, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:kube-router:kube-router:*:*:*:*:*:kubernetes:*:* versions up to (excluding) 2.8.0 Added Reference Type GitHub, Inc.: https://github.com/cloudnativelabs/kube-router/commit/a1f0b2eea3ee0f66b9a5b5c49dcb714619ccd456 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/cloudnativelabs/kube-router/releases/tag/v2.8.0 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/cloudnativelabs/kube-router/security/advisories/GHSA-phqm-jgc3-qf8g Types: Exploit, Mitigation, Patch, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/cloudnativelabs/kube-router/security/advisories/GHSA-phqm-jgc3-qf8g Types: Exploit, Mitigation, Patch, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Mar. 18, 2026
Action Type Old Value New Value Added Reference https://github.com/cloudnativelabs/kube-router/security/advisories/GHSA-phqm-jgc3-qf8g -
New CVE Received by [email protected]
Mar. 18, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H Added CWE CWE-284 Added Reference https://github.com/cloudnativelabs/kube-router/commit/a1f0b2eea3ee0f66b9a5b5c49dcb714619ccd456 Added Reference https://github.com/cloudnativelabs/kube-router/releases/tag/v2.8.0 Added Reference https://github.com/cloudnativelabs/kube-router/security/advisories/GHSA-phqm-jgc3-qf8g