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CVE-2026-2270medium5.9

StatefulSet and ControllerRevision write permissions allow cross-namespace pod creation

Impact

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…

Source excerpt · kubernetes
Applies when

This would require referencing the UID of an existing StatefulSet in the victim’s namespace.

What to do

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

Kubernetes · Kubernetes

Other versions: unaffected

Version / rangeSource status
v1.34.0 through v1.34.11 (inclusive)affected
v1.35.0 through v1.35.8 (inclusive)affected
v1.36.0 through v1.36.4 (inclusive)affected
v1.37.0 through v1.37.0 (inclusive)affected
kubernetes version evidence

Original source 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.

References