Medium · CVSS 5.9CVE-2026-2270

StatefulSet and ControllerRevision write permissions allow cross-namespace pod creationCVE-2026-2270

Answer in brief

CVE-2026-2270 records a Medium severity (CVSS 5.9) vulnerability in StatefulSet and ControllerRevision write permissions allow cross-namespace pod creation. The current sources do not mark it as known exploited. The current feed maps Kubernetes/Kubernetes (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 26, 2026Updated Oct 26, 2026Source checked Oct 26, 2026First seen by HOL Oct 26, 2026Material review Oct 26, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.9
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 5.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Kubernetes/Kubernetes (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Kubernetes/Kubernetesgeneric	>=v1.34.0 <=v1.34.11 \|\| >=v1.35.0 <=v1.35.8 \|\| >=v1.36.0 <=v1.36.4 \|\| >=v1.37.0 <=v1.37.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Kubernetes/Kubernetes.
Review the reported fix. Source-reported solution: To mitigate this vulnerability, upgrade Kubernetes: https://kubernetes.io/docs/tasks/administer-cluster/cluster-upgrade/

Evidence timeline and material changes

Published upstream
Oct 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 26, 2026

Sources and claim methodology

Upstream 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.

Quoted source text, attributed separately from HOL analysis.