CVE-2020-8554 MEDIUM

CVE-2020-8554: Kubernetes man in the middle using LoadBalancer or ExternalIPs

Vendor Kubernetes
Product Kubernetes
Weakness CWE-283
Published January 21, 2021
Last update June 1, 2026
View on NVD All CVEs

CVSS base score

6.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

Kubernetes API server in all versions allow an attacker who is able to create a ClusterIP service and set the spec.externalIPs field, to intercept traffic to that IP address. Additionally, an attacker who is able to patch the status (which is considered a privileged operation and should not typically be granted to users) of a LoadBalancer service can set the status.loadBalancer.ingress.ip to similar effect.

Key dates

02Disclosure timeline

January 21, 2021 CVE published
June 1, 2026 Record updated