CVE-2026-106563 — Backstage: Improper entity validation in deprecated Kubernetes services endpoint
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 dep…
Published: 2026-10-07 · CVSS: 5.3 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7