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5.3Medium

CVE-2026-106563Backstage: Improper entity validation in deprecated Kubernetes services endpoint

backstage backstage; @backstage plugin-kubernetes-backend Published: (1 month ago)

Description

Backstage is an open framework for building developer portals. Prior to 0.21.8, the @backstage/plugin-kubernetes-backend package is affected by improper entity validation in deprecated kubernetes services endpoint. An authenticated user with Kubernetes read permissions could access Kubernetes workload data beyond their intended scope by supplying crafted entity data to the deprecated services endpoint. The exposure is limited to read-only access to Kubernetes object metadata across configured clusters. This issue is fixed in version 0.21.8.

Weakness (CWE): CWE-20CWE-862

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

VendorProductVersions
backstage backstage < 1.54.1
@backstage plugin-kubernetes-backend < 0.21.8
linuxfoundation backstage < 1.54.1
linuxfoundation backstage/plugin-kubernetes-backend < 0.21.8

References and patches

CPE matches (NVD) (2)
  • cpe:2.3:a:linuxfoundation:backstage\/plugin-kubernetes-backend:*:*:*:*:*:node.js:*:* < 0.21.8
  • cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:* < 1.54.1