CVE-2026-106561Backstage: Sensitive information disclosure in Kubernetes resource queries
Updated under an hour ago ()
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It affects backstage and 3 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Backstage is an open framework for building developer portals. Prior to 0.21.9, the @backstage/plugin-kubernetes-backend package is affected by sensitive information disclosure in kubernetes resource queries. An authenticated user holding the standard Kubernetes resource read permission could retrieve sensitive values that the Kubernetes plugin is designed to mask, potentially exposing credentials and other confidential material held in the connected clusters. Exposure is limited to resources that the Backstage service account is permitted to read and that match the targeted catalog entity's namespace and label selector. Deployments whose cluster credentials do not grant read access to these resources are unaffected. This issue is fixed in version 0.21.9.
- CVSS
- 5.0 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
- Weakness (CWE)
- CWE-200, CWE-863
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Oct 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
backstage backstage backstage:backstage (from the name) | before 1.54.2 | CNA record |
@backstage plugin-kubernetes-backend backstage:plugin_kubernetes_backend (from the name) | before 0.21.9 | CNA record |
linuxfoundation backstage/plugin-kubernetes-backend linuxfoundation:backstage/plugin-kubernetes-backend | before 0.21.9 | NVD |
linuxfoundation backstage linuxfoundation:backstage | before 1.54.2 | NVD |
References
- https://github.com/backstage/backstage/security/advisories/GHSA-p795-mqf2-36mfx-refsource-confirm, mitigation, vendor-advisory
- https://github.com/backstage/backstage/commit/388926ae5734bc20bd6a1520d02896be834f6527x-refsource-misc, patch
- https://github.com/backstage/backstage/releases/tag/v1.54.2x-refsource-misc, patch, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.