MEDIUM 5.3 NVD
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
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.
References
- https://github.com/backstage/backstage/commit/2d5d3e77d630455d6d48cfa8f31fd3c126fd6f29
- https://github.com/backstage/backstage/releases/tag/v1.54.1
- https://github.com/backstage/backstage/security/advisories/GHSA-r9ph-3637-55px
This medium severity vulnerability with a CVSS score of 5.3 was published on 2026-10-07 via NVD.
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