Search criteria
1 vulnerability by kube-router
CVE-2026-32254 (GCVE-0-2026-32254)
Vulnerability from cvelistv5 – Published: 2026-03-18 03:14 – Updated: 2026-03-18 13:35
VLAI
Title
Kube-router Proxy Module Blindly Trusts ExternalIPs/LoadBalancer IPs Enabling Cluster-Wide Traffic Hijacking and DNS DoS
Summary
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.
Severity
7.1 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-284 - Improper Access Control
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/cloudnativelabs/kube-router/se… | x_refsource_CONFIRM |
| https://github.com/cloudnativelabs/kube-router/co… | x_refsource_MISC |
| https://github.com/cloudnativelabs/kube-router/re… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| cloudnativelabs | kube-router |
Affected:
< 2.8.0
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-32254",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-18T13:35:53.287054Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-18T13:35:56.647Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/cloudnativelabs/kube-router/security/advisories/GHSA-phqm-jgc3-qf8g"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "kube-router",
"vendor": "cloudnativelabs",
"versions": [
{
"status": "affected",
"version": "\u003c 2.8.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Kube-router is a turnkey solution for Kubernetes networking. Prior to version 2.8.0, Kube-router\u0027s proxy module does not validate externalIPs or loadBalancer IPs before programming them into the node\u0027s 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."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-284",
"description": "CWE-284: Improper Access Control",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-18T03:14:39.392Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/cloudnativelabs/kube-router/security/advisories/GHSA-phqm-jgc3-qf8g",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/cloudnativelabs/kube-router/security/advisories/GHSA-phqm-jgc3-qf8g"
},
{
"name": "https://github.com/cloudnativelabs/kube-router/commit/a1f0b2eea3ee0f66b9a5b5c49dcb714619ccd456",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/cloudnativelabs/kube-router/commit/a1f0b2eea3ee0f66b9a5b5c49dcb714619ccd456"
},
{
"name": "https://github.com/cloudnativelabs/kube-router/releases/tag/v2.8.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/cloudnativelabs/kube-router/releases/tag/v2.8.0"
}
],
"source": {
"advisory": "GHSA-phqm-jgc3-qf8g",
"discovery": "UNKNOWN"
},
"title": "Kube-router Proxy Module Blindly Trusts ExternalIPs/LoadBalancer IPs Enabling Cluster-Wide Traffic Hijacking and DNS DoS"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-32254",
"datePublished": "2026-03-18T03:14:39.392Z",
"dateReserved": "2026-03-11T14:47:05.686Z",
"dateUpdated": "2026-03-18T13:35:56.647Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}