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

October 7, 2026

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.

References

github.com/advisories/GHSA-r9ph-3637-55px
github.com/backstage/backstage/commit/2d5d3e77d630455d6d48cfa8f31fd3c126fd6f29
github.com/backstage/backstage/releases/tag/v1.54.1
github.com/backstage/backstage/security/advisories/GHSA-r9ph-3637-55px
nvd.nist.gov/vuln/detail/CVE-2026-106563

Code Behaviors & Features

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