Read the docs
TI-2026-69076 Aliases CVE-2026-106502GHSA-95p4-vv4g-jxxm

Backstage Scaffolder exposes sensitive data in task failure events

Priority LOW 24CWE-532Published · 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-532.

Summary

Backstage versions before 4.1.0 of the @backstage/plugin-scaffolder-backend package can expose sensitive information in Scaffolder task failure events. The flaw is CWE-532, where sensitive data is written into task failure events. Under specific template and failure conditions, an authenticated user can retrieve backend-managed credentials used during task execution from affected task events.

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 could expose sensitive information in Scaffolder task failure events. Under specific template and failure conditions, an authenticated user may retrieve backend-managed credentials used during task execution from affected task events. This issue is fixed in version 4.1.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00291 21st 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-95p4-vv4g-jxxm
  • 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-95p4-vv4g-jxxm

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 version 4.1.0. The sources list no fixed version for backstage. Red Hat lists Red Hat Developer Hub 1 and Self-service automation portal 2 as affected without a fix, and Red Hat lists no available plan for them.

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-95p4-vv4g-jxxm @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-2026-106502
  2. 2026-10-07 CISA SSVC decision points changed
  3. 2026-10-07 Alias added: GHSA-95p4-vv4g-jxxm
  4. 2026-10-07 Fix available: npm/@backstage/[email protected] · GHSA-95p4-vv4g-jxxm
  5. 2026-10-07 CVSS score added · GHSA-95p4-vv4g-jxxm
  6. 2026-10-07 Weakness changed · GHSA-95p4-vv4g-jxxm
  7. 2026-10-07 5 new references · GHSA-95p4-vv4g-jxxm
  8. 2026-10-08 Affected versions changed · Red Hat
  9. 2026-10-08 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