CVE-2026-2270

CVSS 5.9 (medium) · published 2026-10-26

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.

Weakness: CWE-639

Source: NVD CVE-2026-2270

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

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