What is CVE-2025-5187?

CVE-2025-5187 is a medium-severity vulnerability in Kubernetes, classified under Incorrect Authorization. CVSS score: 6.7/10. Published 2025-08-27.

How severe is CVE-2025-5187?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Is CVE-2025-5187 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Kubernetes

CVE-2025-5187

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.

Vulnerability class: Broken Access Control

EPSS: 0.005 (42.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L.

Affected products

Kubernetes — versions v1.31.0, v1.32.0, v1.33.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

jordan@liggitt.net (issue-tracking)
jordan@liggitt.net (mailing-list)

Frequently asked questions

What is CVE-2025-5187?: CVE-2025-5187 is a medium-severity vulnerability in Kubernetes, classified under Incorrect Authorization. CVSS score: 6.7/10. Published 2025-08-27.
How severe is CVE-2025-5187?: Medium severity. CVSS v3 base score is 6.7 out of 10.
Is CVE-2025-5187 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.