CVE-2026-65834: Projectcapsule Capsule

Medium severity, CVSS 6.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Capsule is a multi-tenancy and policy-based framework for Kubernetes. Prior to 0.13.8, CapsuleConfiguration.Spec.NodeMetadata.ForbiddenLabels.Regex and CapsuleConfiguration.Spec.NodeMetadata.ForbiddenAnnotations.Regex were not validated by the configuration admission webhook, allowing a Cluster Admin to store a malformed regex that later reached regexp.MustCompile in pkg/api/forbidden_list.go through internal/webhook/node/user_metadata.go and crashed the node admission webhook on Node create, update, or patch requests. This issue is fixed in version 0.13.8.

Affected products

• Projectcapsule Capsule: before 0.13.8 (fixed in 0.13.8)

Published 2026-07-30. Last modified 2026-07-31.