CVE-2025-5187: Auth Bypass (CVSS 6.7)

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.

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CVSS v3.1 Score

6.7

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L

Weakness Type (CWE)

CWE-863 Incorrect Authorization

References

Other References

https://github.com/kubernetes/kubernetes/issues/133471 https://groups.google.com/g/kubernetes-security-announce/c/znSNY7XCztE

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 6.7 (MEDIUM).

How severe is CVE-2025-5187? +

CVE-2025-5187 has a CVSS v3.1 score of 6.7 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2025-5187? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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