In all Kubernetes versions prior to v1.10.11, v1.11.5, and v1.12.3, incorrect handling of error responses to proxied upgrade requests in the kube-apiserver allowed specially crafted requests to establish a connection through the Kubernetes API server to backend servers, then send arbitrary requests over the same connection directly to the backend, authenticated with the Kubernetes API server's TLS credentials used to establish the backend connection.

Affected Packages

Go github.com/kubernetes/kubernetes

Affected versions: 0 (fixed in 1.10.11)

Go github.com/kubernetes/kubernetes

Affected versions: 1.11.0 (fixed in 1.11.5)

Go github.com/kubernetes/kubernetes

Affected versions: 1.12.0 (fixed in 1.12.3)

Related CVEs

CVE-2018-1002105

Key Information

GHSA ID

GHSA-579h-mv94-g4gp

Published

February 15, 2022 1:57 AM

Last Modified

May 20, 2021 8:40 PM

CVSS Score

9.0 /10

Primary Ecosystem

Primary Package

github.com/kubernetes/kubernetes

GitHub Reviewed

✓ Yes

Dataset

Last updated: September 15, 2025 6:32 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.