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TI-2026-69064 Aliases CVE-2026-106489GHSA-rg9r-hr7g-5gc2

Authorization flaw in Backstage TechDocs exposes other entities' docs

Priority LOW 29CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure, Security bypass
Confidentiality · integrity · availability
High · None · None
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-22, CWE-862 and the CVSS impact.

Summary

Backstage versions before 1.54.6 and the @backstage/plugin-techdocs-backend package before 2.2.4 are affected. Improper authorization enforcement lets an authenticated user with access to one TechDocs documentation site read documentation belonging to a different entity (CWE-862). The flaw affects only deployments that use an external TechDocs builder with external storage such as S3 or GCS and have the permission framework enabled.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

Backstage is an open framework for building developer portals. Prior to 2.2.4, the @backstage/plugin-techdocs-backend package is affected by improper authorization enforcement for techdocs static content. An authenticated user with access to one TechDocs documentation site could craft a URL able to read documentation belonging to a different entity. This only affects deployments using the external TechDocs builder with an external storage provider (S3, GCS, etc.) and the permission framework enabled. Instances that do not use the permission framework are unaffected, since TechDocs content is visible to all authenticated users by design. This issue is fixed in version 2.2.4.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00289 21st percentileScored 2026-11-07
Fix Partial backstage (backstage): 1.54.6plugin-techdocs-backend (@backstage): 2.2.4+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 1.54.61.54.6Patch availableCNA
backstageplugin-techdocs-backendbefore 2.2.42.2.4Patch availableCNA
—@backstage/plugin-techdocs-backend (npm)before 2.2.42.2.4Patch availableGHSA-rg9r-hr7g-5gc2
  • backstage Vendorbackstage Affected before 1.54.6 Fixed in 1.54.6 Patch available CNA
  • plugin-techdocs-backend Vendorbackstage Affected before 2.2.4 Fixed in 2.2.4 Patch available CNA
  • @backstage/plugin-techdocs-backend (npm) Vendor— Affected before 2.2.4 Fixed in 2.2.4 Patch available GHSA-rg9r-hr7g-5gc2

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:linuxfoundation:backstage\/plugin-techdocs-backend:*:*:*:*:*:node.js:*:*before 2.2.4Vulnerablebackstage
cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*before 1.54.6Vulnerablebackstage
  • cpe:2.3:a:linuxfoundation:backstage\/plugin-techdocs-backend:*:*:*:*:*:node.js:*:* Versions before 2.2.4 Vulnerable ·backstage
  • cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:* Versions before 1.54.6 Vulnerable ·backstage

Remediation

Upgrade the backstage package to 1.54.6 and @backstage/plugin-techdocs-backend to 2.2.4. Red Hat lists Red Hat Developer Hub 1 and Self-service automation portal 2 as affected, with no fix available.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA backstage (backstage) Fixed in 1.54.6
  • Fix · CNA plugin-techdocs-backend (@backstage) Fixed in 2.2.4
  • Fix · GHSA-rg9r-hr7g-5gc2 @backstage/plugin-techdocs-backend (npm) Fixed in 2.2.4 Advisory →

Vendor assessments

Red Hat

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

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

Timeline

  1. 2026-10-07 Threatist record created from CVE-2026-106489
  2. 2026-10-07 Affected versions changed · Red Hat
  3. 2026-10-07 CVSS score added · Red Hat
  4. 2026-10-07 CISA SSVC decision points changed
  5. 2026-10-07 Priority changed: MEDIUM → LOW
  6. 2026-10-07 Alias added: GHSA-rg9r-hr7g-5gc2
  7. 2026-10-07 Fix available: npm/@backstage/[email protected] · GHSA-rg9r-hr7g-5gc2
  8. 2026-10-07 CVSS score added · GHSA-rg9r-hr7g-5gc2
  9. 2026-10-07 Weakness changed · GHSA-rg9r-hr7g-5gc2
  10. 2026-10-07 5 new references · GHSA-rg9r-hr7g-5gc2
  11. 2026-10-27 Affected versions changed · Red Hat

References

Patch 2

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