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TI-2026-69080 Aliases CVE-2026-106506GHSA-vwp5-f99x-x3rq

Improper input validation in Backstage scaffolder task list ordering

Priority LOW 23CWE-202Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Information disclosure
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-203.

Summary

The @backstage/plugin-scaffolder-backend package before 4.1.0 has improper input validation in scaffolder task list ordering, and the backstage product before 1.54.6 is also affected. An authenticated user with permission to create and read scaffolder tasks may infer confidential task data under specific conditions. Exploitation requires retained task secrets, visibility of a target task, knowledge of the secret structure, and repeated requests. The weakness is classified as CWE-202.

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 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by improper input validation in scaffolder task list ordering. An authenticated Backstage user with permission to create and read relevant scaffolder tasks may be able to infer confidential task data under specific conditions. Successful exploitation requires retained task secrets, visibility of a target task, knowledge of the secret structure, and repeated requests. This issue is fixed in version 4.1.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00218 12th percentileScored 2026-11-07
Fix Partial backstage (backstage): 1.54.6plugin-scaffolder-backend (@backstage): 4.1.0+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-scaffolder-backendbefore 4.1.04.1.0Patch availableCNA
—@backstage/plugin-scaffolder-backend (npm)before 4.1.04.1.0Patch availableGHSA-vwp5-f99x-x3rq
  • backstage Vendorbackstage Affected before 1.54.6 Fixed in 1.54.6 Patch available CNA
  • plugin-scaffolder-backend Vendorbackstage Affected before 4.1.0 Fixed in 4.1.0 Patch available CNA
  • @backstage/plugin-scaffolder-backend (npm) Vendor— Affected before 4.1.0 Fixed in 4.1.0 Patch available GHSA-vwp5-f99x-x3rq

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend:*:*:*:*:*:*:*:*before 4.1.0Vulnerablebackstage
cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*before 1.54.6Vulnerablebackstage
  • cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend:*:*:*:*:*:*:*:* Versions before 4.1.0 Vulnerable ·backstage
  • cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:* Versions before 1.54.6 Vulnerable ·backstage

Remediation

Upgrade @backstage/plugin-scaffolder-backend to 4.1.0, which fixes the issue. The sources list no fixed version for backstage. Red Hat's plan for Red Hat Developer Hub 1 and Self-service automation portal 2 is none available.

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-scaffolder-backend (@backstage) Fixed in 4.1.0
  • Fix · GHSA-vwp5-f99x-x3rq @backstage/plugin-scaffolder-backend (npm) Fixed in 4.1.0 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-2026-106506
  2. 2026-10-07 Alias added: GHSA-vwp5-f99x-x3rq
  3. 2026-10-07 Fix available: npm/@backstage/[email protected] · GHSA-vwp5-f99x-x3rq
  4. 2026-10-07 CVSS score added · GHSA-vwp5-f99x-x3rq
  5. 2026-10-07 Weakness changed · GHSA-vwp5-f99x-x3rq
  6. 2026-10-07 5 new references · GHSA-vwp5-f99x-x3rq
  7. 2026-10-07 CISA SSVC decision points changed
  8. 2026-10-09 Affected versions changed · Red Hat
  9. 2026-10-09 CVSS score added · Red Hat
  10. 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