CVE-2020-8559: Kubernetes

Medium severity, CVSS 6.8. EPSS: 6.1% chance of exploitation in the next 30 days.

The Kubernetes kube-apiserver in versions v1.6-v1.15, and versions prior to v1.16.13, v1.17.9 and v1.18.6 are vulnerable to an unvalidated redirect on proxied upgrade requests that could allow an attacker to escalate privileges from a node compromise to a full cluster compromise.

Affected products

• Kubernetes Kubernetes: from 1.6.0, up to and including 1.15.0; from 1.16.0, before 1.16.13 (fixed in 1.16.13); from 1.17.0, before 1.17.9 (fixed in 1.17.9); from 1.18.0, before 1.18.6 (fixed in 1.18.6)

Published 2020-07-22. Last modified 2026-06-17.