{"id":"CVE-2026-32254","state":"PUBLISHED","title":"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.","publishedAt":"2026-03-18T03:14:39.392Z","updatedAt":"2026-03-18T13:35:56.647Z","severity":{"score":7.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["cloudnativelabs kube-router"],"affected":[{"vendor":"cloudnativelabs","product":"kube-router","versions":[{"version":"< 2.8.0","status":"affected"}]}],"references":["https://github.com/cloudnativelabs/kube-router/security/advisories/GHSA-phqm-jgc3-qf8g","https://github.com/cloudnativelabs/kube-router/commit/a1f0b2eea3ee0f66b9a5b5c49dcb714619ccd456","https://github.com/cloudnativelabs/kube-router/releases/tag/v2.8.0"],"weaknesses":["CWE-284"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/32xxx/CVE-2026-32254.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-32254","state":"PUBLISHED","datePublished":"2026-03-18T03:14:39.392Z","dateUpdated":"2026-03-18T13:35:56.647Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-11T14:47:05.686Z"},"containers":{"cna":{"title":"Kube-router Proxy Module Blindly Trusts ExternalIPs/LoadBalancer IPs Enabling Cluster-Wide Traffic Hijacking and DNS DoS","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"cloudnativelabs","product":"kube-router","versions":[{"version":"< 2.8.0","status":"affected"}]}],"references":[{"url":"https://github.com/cloudnativelabs/kube-router/security/advisories/GHSA-phqm-jgc3-qf8g","name":"https://github.com/cloudnativelabs/kube-router/security/advisories/GHSA-phqm-jgc3-qf8g","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/cloudnativelabs/kube-router/commit/a1f0b2eea3ee0f66b9a5b5c49dcb714619ccd456","name":"https://github.com/cloudnativelabs/kube-router/commit/a1f0b2eea3ee0f66b9a5b5c49dcb714619ccd456","tags":["x_refsource_MISC"]},{"url":"https://github.com/cloudnativelabs/kube-router/releases/tag/v2.8.0","name":"https://github.com/cloudnativelabs/kube-router/releases/tag/v2.8.0","tags":["x_refsource_MISC"]}],"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","lang":"en","description":"CWE-284: Improper Access Control","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-03-18T03:14:39.392Z"},"source":{"advisory":"GHSA-phqm-jgc3-qf8g","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/cloudnativelabs/kube-router/security/advisories/GHSA-phqm-jgc3-qf8g","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-18T13:35:53.287054Z","id":"CVE-2026-32254","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-03-18T13:35:56.647Z"}}]}}}