CVE-2026-106561

NVD: Backstage is an open framework for building developer portals. NVD: Prior to 0.21.9, the @backstage/plugin-kubernetes-backend package is affected by sensitive information disclosure in kubernetes resource queries. NVD: 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.

Source-published summary

NVD: Backstage is an open framework for building developer portals. NVD: Prior to 0.21.9, the @backstage/plugin-kubernetes-backend package is affected by sensitive information disclosure in kubernetes resource queries. NVD: 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.

Possible impact

Source describes information exposure review · authenticated boundary. Possible impact: An attacker may be able to access information that should not be exposed.

Affected context

Affected product or version requires source confirmation.

Remediation / advisory

Patch confirmed by source text; fixed version context: 0.21.9..

Why it matters

Source describes information exposure review · authenticated boundary. Possible impact: An attacker may be able to access information that should not be exposed.; CVSS 5.0 (MEDIUM); EPSS percentile 9; not listed in KEV; Patch confirmed by source text; fixed version context: 0.21.9; sources: NVD, OSV.

What to verify

Confirm affected product/version, vendor advisory, patch or mitigation, and exposure.

Exposure hint

authenticated boundary

Impact tags

Urgency reasons

Source-derived note

Summary derived from NVD / OSV description; unsafe procedural detail is not shown.

Redaction metadata

source summary used

True

fallback summary used

False

unsafe procedural detail present

false

raw source displayed

false

public summary redacted

true

Remediation handoff

Public-safe static handoff for human/Codex remediation planning. Scan, patch, external execution, and auto remediation are disabled.

Safety note

This radar shows source-published defensive context only. Exploit procedures, exploit strings, scanner commands, and auto-remediation are not provided.

Official references

• https://nvd.nist.gov/vuln/detail/CVE-2026-106561
• https://osv.dev/vulnerability/CVE-2026-106561
• https://github.com/backstage/backstage/security/advisories/GHSA-p795-mqf2-36mf