CVE-2020-35514

Severity: high (CVSS 7.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-06-02 · updated 2026-06-17
Weakness: CWE-266

Description

An insecure modification flaw in the /etc/kubernetes/kubeconfig file was found in OpenShift. This flaw allows an attacker with access to a running container which mounts /etc/kubernetes or has local access to the node, to copy this kubeconfig file and attempt to add their own node to the OpenShift cluster. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. This flaw affects versions before openshift4/ose-machine-config-operator v4.7.0-202105111858.p0.

Affected products

Openshift: before 4.7.0; 4.7.0 — fixed in 4.7.0

How to fix

Upgrade to a fixed version: Openshift 4.7.0. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2020-35514 or the next vulnerability affects your stack