Vulnerability record · CVE-2020-8559 · published 22 July 2020

CVE-2020-8559: Kubernetes open redirect vulnerability

Kubernetes · Kubernetes

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.

6.8 CVSS 3.1 Medium EPSS 6.1% · top 6.8% CWE-601 · Open redirect

6.8CVSS 3.1 base score, v2 6.0

6.1%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

6References, 4 tagged exploit

17 Jun 2026Last modified by NVD

Description

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Kubernetes Kubernetes

References

Link	Tags
https://github.com/kubernetes/kubernetes/issues/92914	ExploitIssue TrackingPatchThird Party Advisory
https://groups.google.com/d/msg/kubernetes-security-announce/JAIGG5yNROs/19nHQ5wkBwAJ	ExploitThird Party Advisory
https://security.netapp.com/advisory/ntap-20200810-0004/	Third Party Advisory
https://github.com/kubernetes/kubernetes/issues/92914	ExploitIssue TrackingPatchThird Party Advisory
https://groups.google.com/d/msg/kubernetes-security-announce/JAIGG5yNROs/19nHQ5wkBwAJ	ExploitThird Party Advisory
https://security.netapp.com/advisory/ntap-20200810-0004/	Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-8559), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.