---
id: "CVE-2026-2270"
kind: "vulnerability"
aliases: ["CVE-2026-2270"]
title: "Kubernetes: StatefulSet controller lets namespace writers create pods elsewhere"
severity: "medium"
cvss: 5.9
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "kubernetes", "multi-tenant-clusters"]
not_affected_if: ["no-namespace-scoped-statefulset-write", "single-tenant-cluster"]
published_at: "2026-10-26T23:17:00+00:00"
first_seen_at: "2026-10-26T23:25:48+00:00"
updated_at: "2026-10-26T23:25:59+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-2270", "first_seen_at": "2026-10-26T23:25:48+00:00"}]
---

# Kubernetes: StatefulSet controller lets namespace writers create pods elsewhere

A user with write access to StatefulSets and ControllerRevisions in one namespace can make the StatefulSet controller create a pod in another namespace. The attacker controls that pod's metadata and spec, but the garbage collector deletes it unless the attacker also knows the UID of a StatefulSet in the victim namespace.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- unknown

## Timeline

- 2026-10-26T23:25:48+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-2270

## From the sources

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.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_