CVE Catalog

CVE-2026-106563

MediumCVSS 5.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.22%

12th percentile - higher than 12% of all known CVEs

Summary

In Backstage prior to 0.21.8, the @backstage/plugin-kubernetes-backend package is affected by improper entity validation in a 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.

Risk Assessment

An authenticated user can gain unauthorized access to Kubernetes object metadata across configured clusters, potentially revealing infrastructure information.

Recommendation

Upgrade @backstage/plugin-kubernetes-backend to version 0.21.8 or later. Consider disabling the deprecated Kubernetes services endpoint.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS