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CVE-2026-2270— StatefulSet and ControllerRevision write permissions allow cross-namespace pod creation

Quick assessment

Affected
Kubernetes Kubernetes
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 StatefulSet 控制器中存在一个“混淆代理”（confused deputy）攻击漏洞。该漏洞允许拥有命名空间范围内对 StatefulSet 和 ControllerRevision 对象写权限的用户，创建跨命名空间的 Pod。利用此漏洞的攻击者将完全控制所生成 Pod 的元数据和规范，包括命名空间的选择。需要注意的是，除非攻击者能够构建一个有效的 StatefulSet OwnerReference，否则跨命名空间的 Pod 将被垃圾回收器立即删除。构建有效的 OwnerReference 需要引用

CVSS 5.9 · Medium

Possible ATT&CK Techniques 1 AI

T1548.002 · Bypass User Account Control
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I. Basic Information for CVE-2026-2270

Vulnerability Information
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Vulnerability Title
StatefulSet and ControllerRevision write permissions allow cross-namespace pod creation
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Kubernetes Kubernetes v1.34.0 ~ v1.34.11 -

II. Public POCs for CVE-2026-2270

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III. Intelligence Information for CVE-2026-2270

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Other References for CVE-2026-2270 (2)

IV. Related Vulnerabilities

Same product: Kubernetes
Same vendor: Kubernetes
Same weakness: CWE-639