What’s Vulnerable › Vulnerabilities
CVE-2026-2270: StatefulSet and ControllerRevision write permissions allow cross-namespace pod creation
- Severity: medium (CVSS 5.9 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-26 · updated 2026-10-29
- Weakness: CWE-639
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.
Affected products
- Kubernetes: from v1.34.0 through v1.34.11; from v1.35.0 through v1.35.8; from v1.36.0 through v1.36.4; from v1.37.0 through v1.37.0
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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