{"id":"CVE-2021-25736","aliases":["GHSA-35c7-w35f-xwgh","GO-2023-2159"],"url":"https://o3.security/vulnerability/CVE-2021-25736","summary":"Kube-proxy may unintentionally forward traffic","details":"Kube-proxy\n on Windows can unintentionally forward traffic to local processes \nlistening on the same port (“spec.ports[*].port”) as a LoadBalancer \nService when the LoadBalancer controller\n does not set the “status.loadBalancer.ingress[].ip” field. Clusters \nwhere the LoadBalancer controller sets the \n“status.loadBalancer.ingress[].ip” field are unaffected.","published":"2023-10-30T03:15:07.653Z","modified":"2026-08-07T16:57:17.918977Z","cvss":{"score":6.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"k8s.io/kubernetes","fixedVersion":"1.21.0"}],"fix":{"url":"https://github.com/kubernetes/kubernetes/pull/99958","label":"kubernetes/kubernetes#99958"},"references":[{"type":"ADVISORY","url":"https://github.com/kubernetes/kubernetes/pull/99958"},{"type":"ADVISORY","url":"https://groups.google.com/g/kubernetes-security-announce/c/lIoOPObO51Q/m/O15LOazPAgAJ"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20231221-0003/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T16:57:17.918977Z"}}