Incorrect Authorization Affecting @backstage/plugin-kubernetes-backend package, versions <0.21.9
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- published11 Oct 2026
- disclosed7 Oct 2026
- creditKashish Mittal
Introduced: 7 Oct 2026
NewCVE-2026-106561 (opens in a new tab)How to fix?
Upgrade @backstage/plugin-kubernetes-backend to version 0.21.9 or higher.
Overview
@backstage/plugin-kubernetes-backend is an A Backstage backend plugin that integrates towards Kubernetes
Affected versions of this package are vulnerable to Incorrect Authorization via the sanitizeKubernetesResponse method in KubernetesFetcher.ts, where Kubernetes Secret values are not redacted when the resource is queried as a custom resource whose list kind resolves to SecretList. An authenticated attacker with access to the Backstage Kubernetes backend can read plaintext Secret data and stringData field values that should be masked, by querying the affected custom resource path.