CVE-2025-5187

Nodes can delete themselves by adding an OwnerReference

State: Published
Severity: 6.7 Medium
Published: Aug 27, 2025
Updated: Feb 26, 2026
Reserved: May 25, 2025

Description

A vulnerability exists in the NodeRestriction admission controller in Kubernetes clusters where node users can delete their corresponding node object by patching themselves with an OwnerReference to a cluster-scoped resource. If the OwnerReference resource does not exist or is subsequently deleted, the given node object will be deleted via garbage collection.

Scores

CVSS	Score	Vector	Source
3.1	6.7 Medium	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L	kubernetes

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
KubernetesKubernetes	v1.31.0 through v1.31.11Affected v1.32.0 through v1.32.7Affected v1.33.0 through v1.33.3Affected

References

https://github.com/kubernetes/kubernetes/issues/133471issue-tracking
https://groups.google.com/g/kubernetes-security-announce/c/znSNY7XCztEmailing-list

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