GO-2026-6520 Capsule: Tenant owner bypasses Capsule's forbidden namespace/service/node label and annotation enforcement in github.com/projectcapsule/capsule

Capsule: Tenant owner bypasses Capsule's forbidden namespace/service/node label and annotation enforcement in github.com/projectcapsule/capsule...

EUVD-2026-83164

Capsule is a multi-tenancy and policy-based framework for Kubernetes. Prior to 0.13.7, ForbiddenListSpec.ExactMatch in pkg/api/forbiddenlist.go sorts denied metadata keys case-insensitively and then uses sort.SearchStrings, which assumes byte-order sorting. When an administrator's forbidden list...