Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-106563

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 12.2%
CVSS Severity
CVSS v3 Score 5.3
Products affected by CVE-2026-106563


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