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TI-2026-69065 Aliases CVE-2026-106490GHSA-7mfx-xg57-53c9

Path traversal in Backstage TechDocs static content requests

Priority LOW 29CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-22 and the CVSS impact.

Summary

Backstage is affected before 1.54.6, and @backstage/plugin-techdocs-backend is affected before 2.2.4. Improper input validation in TechDocs static content requests lets an authenticated Backstage user read restricted TechDocs content when the Azure Blob Storage provider is used and entity-level permissions are enabled. Deployments that intentionally disable the default backend authentication policy may have broader exposure. The weakness is CWE-22.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

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 input validation in techdocs static content requests. When using the Azure Blob Storage provider, an authenticated Backstage user may be able to read restricted TechDocs content when entity-level permissions are enabled. Deployments that intentionally disable the default backend authentication policy may have broader exposure. This issue is fixed in version 2.2.4.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00369 31st percentileScored 2026-11-07
Fix Fixed backstage (backstage): 1.54.6plugin-techdocs-backend (@backstage): 2.2.4+1 more product

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-7mfx-xg57-53c9
  • 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-7mfx-xg57-53c9

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

Update @backstage/plugin-techdocs-backend to version 2.2.4, which fixes the issue. The sources list no fixed version for backstage.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA backstage (backstage) Fixed in 1.54.6
  • Fix · CNA plugin-techdocs-backend (@backstage) Fixed in 2.2.4
  • Fix · GHSA-7mfx-xg57-53c9 @backstage/plugin-techdocs-backend (npm) Fixed in 2.2.4 Advisory →

Timeline

  1. 2026-10-07 Threatist record created from CVE-2026-106490
  2. 2026-10-07 CISA SSVC decision points changed
  3. 2026-10-07 Priority changed: MEDIUM → LOW
  4. 2026-10-07 Alias added: GHSA-7mfx-xg57-53c9
  5. 2026-10-07 Fix available: npm/@backstage/[email protected] · GHSA-7mfx-xg57-53c9
  6. 2026-10-07 CVSS score added · GHSA-7mfx-xg57-53c9
  7. 2026-10-07 Weakness changed · GHSA-7mfx-xg57-53c9
  8. 2026-10-07 5 new references · GHSA-7mfx-xg57-53c9

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