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TI-2026-69166 Aliases CVE-2026-106559GHSA-75qf-886x-5xf2

Input validation flaw in Backstage Confluence to Markdown scaffolder

Priority LOW 29CWE-22Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

The @backstage/plugin-scaffolder-backend-module-confluence-to-markdown npm package in Backstage is affected before 0.3.25. Insufficient input validation (CWE-22) lets attackers influence file write operations during template execution. Exploitation requires a Backstage user to run a template that processes attacker-influenced Confluence content.

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 0.3.25, the @backstage/plugin-scaffolder-backend-module-confluence-to-markdown package is affected by improper input validation in confluence to markdown scaffolder module. Insufficient input validation in the Confluence to Markdown scaffolder module could allow an attacker to influence file write operations during template execution. Exploitation requires a Backstage user to run a template that processes attacker-influenced Confluence content. This issue is fixed in version 0.3.25.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00332 26th percentileScored 2026-11-07
Fix Fixed backstage (backstage): 1.54.6plugin-scaffolder-backend-module-confluence-to-markdown (@backstage): 0.3.25+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-scaffolder-backend-module-confluence-to-markdownbefore 0.3.250.3.25Patch availableCNA
—@backstage/plugin-scaffolder-backend-module-confluence-to-markdown (npm)before 0.3.250.3.25Patch availableGHSA-75qf-886x-5xf2
  • backstage Vendorbackstage Affected before 1.54.6 Fixed in 1.54.6 Patch available CNA
  • plugin-scaffolder-backend-module-confluence-to-markdown Vendorbackstage Affected before 0.3.25 Fixed in 0.3.25 Patch available CNA
  • @backstage/plugin-scaffolder-backend-module-confluence-to-markdown (npm) Vendor— Affected before 0.3.25 Fixed in 0.3.25 Patch available GHSA-75qf-886x-5xf2

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend-module-confluence-to-markdown:*:*:*:*:*:node.js:*:*before 0.3.25Vulnerablebackstage
cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*before 1.54.6Vulnerablebackstage
  • cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend-module-confluence-to-markdown:*:*:*:*:*:node.js:*:* Versions before 0.3.25 Vulnerable ·backstage
  • cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:* Versions before 1.54.6 Vulnerable ·backstage

Remediation

Update the @backstage/plugin-scaffolder-backend-module-confluence-to-markdown package to version 0.3.25. 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-scaffolder-backend-module-confluence-to-markdown (@backstage) Fixed in 0.3.25
  • Fix · GHSA-75qf-886x-5xf2 @backstage/plugin-scaffolder-backend-module-confluence-to-markdown (npm) Fixed in 0.3.25 Advisory →

Timeline

  1. 2026-10-07 Threatist record created from CVE-2026-106559
  2. 2026-10-07 CISA SSVC decision points changed
  3. 2026-10-07 Priority changed: MEDIUM → LOW
  4. 2026-10-07 Alias added: GHSA-75qf-886x-5xf2
  5. 2026-10-07 Fix available: npm/@backstage/[email protected] · GHSA-75qf-886x-5xf2
  6. 2026-10-07 CVSS score added · GHSA-75qf-886x-5xf2
  7. 2026-10-07 Weakness changed · GHSA-75qf-886x-5xf2
  8. 2026-10-07 5 new references · GHSA-75qf-886x-5xf2
  9. 2026-10-16 CVSS score added · NVD

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