Vulnerability Description
A confused deputy attack exists in the StatefulSet controller that allows a user with namespace-scoped write permissions on StatefulSet and ControllerRevision objects to create a cross-namespace pod. An attacker exploiting this vulnerability would have full control over the resulting pod’s metadata and specification, including namespace selection. Note that the cross-namespace pod will be immediately deleted by the garbage collector unless the attacker is able to construct a valid StatefulSet OwnerReference. This would require referencing the UID of an existing StatefulSet in the victim’s namespace.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/kubernetes/kubernetes/issues/142097
- https://groups.google.com/g/kubernetes-security-announce/c/wv0iV-Rcmj4
- http://www.openwall.com/lists/oss-security/2026/09/23/35
FAQ
What is CVE-2026-2270?
CVE-2026-2270 is a vulnerability with a CVSS score of 5.9 (MEDIUM). A confused deputy attack exists in the StatefulSet controller that allows a user with namespace-scoped write permissions on StatefulSet and ControllerRevision objects to create a cross-namespace pod. ...
How severe is CVE-2026-2270?
CVE-2026-2270 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-2270?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.