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TI-2026-69067 Aliases CVE-2026-106492GHSA-cq7v-rfgc-5c7v

Backstage: Improper preservation of access restrictions during service credential delegation

Priority LOW 33CWE-269Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation, Security bypass
Confidentiality · integrity · availability
Low · High · Low
Fix status
Partial Red Hat: 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-269 and CWE-863.

Summary

Backstage is an open framework for building developer portals. Prior to 0.16.1 and 0.17.8, the @backstage/backend-defaults package is affected by improper preservation of access restrictions during service credential delegation. An external service credential configured with access restrictions (e.g., read-only) could bypass those restrictions by routing requests through plugin delegation paths. This could allow a restricted service to perform operations beyond its intended scope, including write operations on plugins it was restricted to read-only access for. This issue is fixed in versions 0.16.1 and 0.17.8.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00208 10th percentileScored 2026-11-07
Fix Partial backstage (backstage): 1.49.6, 1.54.6backend-defaults (@backstage): 0.16.1, 0.17.8+1 more productRed Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
backstagebackstagebefore 1.49.6; 1.50.0-next.0 to before 1.54.61.49.6, 1.54.6Patch availableCNA
backstagebackend-defaultsbefore 0.16.1; 0.17.0 to before 0.17.80.16.1, 0.17.8Patch availableCNA
—@backstage/backend-defaults (npm)before 0.17.80.17.8Patch availableGHSA-cq7v-rfgc-5c7v
  • backstage Vendorbackstage Affected before 1.49.6; 1.50.0-next.0 to before 1.54.6 Fixed in 1.49.6, 1.54.6 Patch available CNA
  • backend-defaults Vendorbackstage Affected before 0.16.1; 0.17.0 to before 0.17.8 Fixed in 0.16.1, 0.17.8 Patch available CNA
  • @backstage/backend-defaults (npm) Vendor— Affected before 0.17.8 Fixed in 0.17.8 Patch available GHSA-cq7v-rfgc-5c7v

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:linuxfoundation:backstage\/backend-defaults:*:*:*:*:*:node.js:*:*before 0.16.1; 0.17.0 to before 0.17.8Vulnerablebackstage
cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*before 1.49.6; 1.50.0 to before 1.54.6Vulnerablebackstage
  • cpe:2.3:a:linuxfoundation:backstage\/backend-defaults:*:*:*:*:*:node.js:*:* Versions before 0.16.1; 0.17.0 to before 0.17.8 Vulnerable ·backstage
  • cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:* Versions before 1.49.6; 1.50.0 to before 1.54.6 Vulnerable ·backstage

Remediation

  • Fix · CNA backstage (backstage) Fixed in 1.49.6, 1.54.6
  • Fix · CNA backend-defaults (@backstage) Fixed in 0.16.1, 0.17.8
  • Fix · GHSA-cq7v-rfgc-5c7v @backstage/backend-defaults (npm) Fixed in 0.17.8 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Developer Hub 1AffectedNo fix yet
Self-service automation portal 2AffectedNo fix yet

Timeline

  1. 2026-10-07 Threatist record created from CVE-2026-106492
  2. 2026-10-07 Affected versions changed · Red Hat
  3. 2026-10-07 CVSS score added · Red Hat
  4. 2026-10-07 Alias added: GHSA-cq7v-rfgc-5c7v
  5. 2026-10-07 Fix available: npm/@backstage/[email protected] · GHSA-cq7v-rfgc-5c7v
  6. 2026-10-07 CVSS score added · GHSA-cq7v-rfgc-5c7v
  7. 2026-10-07 Weakness changed · GHSA-cq7v-rfgc-5c7v
  8. 2026-10-07 7 new references · GHSA-cq7v-rfgc-5c7v
  9. 2026-10-07 Priority changed: MEDIUM → LOW
  10. 2026-10-09 CISA SSVC decision points changed
  11. 2026-10-23 CVSS score added · NVD
  12. 2026-10-27 Affected versions changed · Red Hat

References

Patch 4

Advisory 2

Other 1

  • TI-2023-17988 Insecure sandbox in Backstage Scaffolder plugin CVSS 3.1CRITICAL 9.9
  • TI-2026-69075 Sensitive information exposure in Backstage Scaffolder CVSS 3.1CRITICAL 9.6
  • TI-2026-69061 Path traversal in Backstage Bitbucket pull-request scaffolder actions CVSS 3.1CRITICAL 9.9
  • TI-2026-60083 Backstage: Improper input validation in TechDocs MkDocs configuration CVSS 3.1HIGH 8.8
  • TI-2026-69165 Backstage TechDocs config flaw allows code execution CVSS 3.1HIGH 8.8
  • TI-2026-69083 Code injection via MkDocs theme configuration in Backstage TechDocs CVSS 3.1HIGH 8.8
See all 52 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences