{"cve":"CVE-2020-8562","nvd":{"published":"2022-02-01T11:15:10.903","modified":"2026-06-17T03:26:33.373","status":"Modified","description":"As mitigations to a report from 2019 and CVE-2020-8555, Kubernetes attempts to prevent proxied connections from accessing link-local or localhost networks when making user-driven connections to Services, Pods, Nodes, or StorageClass service providers. As part of this mitigation Kubernetes does a DNS name resolution check and validates that response IPs are not in the link-local (169.254.0.0/16) or localhost (127.0.0.0/8) range. Kubernetes then performs a second DNS resolution without validation for the actual connection. If a non-standard DNS server returns different non-cached responses, a user may be able to bypass the proxy IP restriction and access private networks on the control plane.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","score":3.1},"cwes":["CWE-367"],"references":["https://github.com/kubernetes/kubernetes/issues/101493","https://groups.google.com/g/kubernetes-security-announce/c/-MFX60_wdOY","https://kubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves/","https://security.netapp.com/advisory/ntap-20220225-0002/","https://github.com/kubernetes/kubernetes/issues/101493"],"products":["kubernetes:kubernetes"],"source":"nvd","synced_at":"2026-10-19T21:27:20.926095847+00:00"},"epss":{"cve":"CVE-2020-8562","score":0.01186,"percentile":0.67875,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-qh36-44jv-c8xj","url":"https://osv.dev/vulnerability/GHSA-qh36-44jv-c8xj","summary":"Potential proxy IP restriction bypass in Kubernetes","modified":"2026-09-10T03:49:17.135092991Z","packages":[{"ecosystem":"Go","name":"k8s.io/kubernetes","purl":"pkg:golang/k8s.io/kubernetes","ranges":[">=1.21.0 <=1.21.1"],"fixed":[]},{"ecosystem":"Go","name":"k8s.io/kubernetes","purl":"pkg:golang/k8s.io/kubernetes","ranges":[">=1.20.0 <=1.20.7"],"fixed":[]},{"ecosystem":"Go","name":"k8s.io/kubernetes","purl":"pkg:golang/k8s.io/kubernetes","ranges":[">=1.19.0 <=1.19.11"],"fixed":[]},{"ecosystem":"Go","name":"k8s.io/kubernetes","purl":"pkg:golang/k8s.io/kubernetes","ranges":["<=1.18.19"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}