Description
Improper validation of URL redirection in the Kubernetes API server in versions prior to v1.14.0 allows an attacker-controlled Kubelet to redirect API server requests from streaming endpoints to arbitrary hosts. Impacted API servers will follow the redirect as a GET request with client-certificate credentials for authenticating to the Kubelet.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Kubernetes | Kubernetes | v1.14 – < v1.14.0 | v1.14.0 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | kubernetes | 1.17.4-1 | — |
| Debian 13 | kubernetes | 1.17.4-1 | — |
| Debian 12 | kubernetes | 1.17.4-1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat OpenShift 3 | atomic-openshift +12 | 3.11.346-1.git.0.ea10721.el7 | RHSA-2020:5363 |
Advisories 1
- RHSA-2020:5363 Red Hat Security Advisory: OpenShift Container Platform 3.11.346 security and bug fix update Red Hat Security Advisories (RHSA) · Feb 24, 2026