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TI-2026-69061 Aliases CVE-2026-106486GHSA-g8rx-f7m5-7794

Path traversal in Backstage Bitbucket pull-request scaffolder actions

Priority MEDIUM 43CWE-22Published · Updated

Key facts

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

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

Summary

The Backstage developer portal framework before 1.54.6, the @backstage/plugin-scaffolder-backend-module-bitbucket-cloud package before 0.3.10, and the @backstage/plugin-scaffolder-backend-module-bitbucket-server package before 0.2.25 are affected. The Bitbucket pull-request scaffolder actions do not sufficiently validate filesystem paths, a weakness classified as CWE-22. An authenticated user who can run an eligible template and influence an allowed Bitbucket repository can affect paths outside the expected working area, potentially compromising backend confidentiality, integrity, or availability.

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 0.3.10 in @backstage/plugin-scaffolder-backend-module-bitbucket-cloud and 0.2.25 in @backstage/plugin-scaffolder-backend-module-bitbucket-server, the Bitbucket pull-request Scaffolder actions did not sufficiently validate filesystem paths. An authenticated user who can execute an eligible template and influence an allowed Bitbucket repository could affect paths outside the expected working area, potentially compromising backend confidentiality, integrity, or availability. This issue is fixed in @backstage/plugin-scaffolder-backend-module-bitbucket-cloud 0.3.10 and @backstage/plugin-scaffolder-backend-module-bitbucket-server 0.2.25.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00367 30th percentileScored 2026-11-07
Fix Fixed backstage (backstage): 1.54.6plugin-scaffolder-backend-module-bitbucket-cloud (@backstage): 0.3.10+3 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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-bitbucket-cloudbefore 0.3.100.3.10Patch availableCNA
backstageplugin-scaffolder-backend-module-bitbucket-serverbefore 0.2.250.2.25Patch availableCNA
—@backstage/plugin-scaffolder-backend-module-bitbucket-cloud (npm)before 0.3.100.3.10Patch availableGHSA-g8rx-f7m5-7794
—@backstage/plugin-scaffolder-backend-module-bitbucket-server (npm)before 0.2.250.2.25Patch availableGHSA-g8rx-f7m5-7794
  • backstage Vendorbackstage Affected before 1.54.6 Fixed in 1.54.6 Patch available CNA
  • plugin-scaffolder-backend-module-bitbucket-cloud Vendorbackstage Affected before 0.3.10 Fixed in 0.3.10 Patch available CNA
  • plugin-scaffolder-backend-module-bitbucket-server Vendorbackstage Affected before 0.2.25 Fixed in 0.2.25 Patch available CNA
  • @backstage/plugin-scaffolder-backend-module-bitbucket-cloud (npm) Vendor— Affected before 0.3.10 Fixed in 0.3.10 Patch available GHSA-g8rx-f7m5-7794
  • @backstage/plugin-scaffolder-backend-module-bitbucket-server (npm) Vendor— Affected before 0.2.25 Fixed in 0.2.25 Patch available GHSA-g8rx-f7m5-7794

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend-module-bitbucket-cloud:*:*:*:*:*:node.js:*:*before 0.3.10Vulnerablebackstage
cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend-module-bitbucket-server:*:*:*:*:*:node.js:*:*before 0.2.25Vulnerablebackstage
cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*before 1.54.6Vulnerablebackstage
  • cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend-module-bitbucket-cloud:*:*:*:*:*:node.js:*:* Versions before 0.3.10 Vulnerable ·backstage
  • cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend-module-bitbucket-server:*:*:*:*:*:node.js:*:* Versions before 0.2.25 Vulnerable ·backstage
  • cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:* Versions before 1.54.6 Vulnerable ·backstage

Remediation

The @backstage/plugin-scaffolder-backend-module-bitbucket-cloud package is fixed in 0.3.10, and the @backstage/plugin-scaffolder-backend-module-bitbucket-server package is fixed in 0.2.25. 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-bitbucket-cloud (@backstage) Fixed in 0.3.10
  • Fix · CNA plugin-scaffolder-backend-module-bitbucket-server (@backstage) Fixed in 0.2.25
  • Fix · GHSA-g8rx-f7m5-7794 @backstage/plugin-scaffolder-backend-module-bitbucket-cloud (npm) Fixed in 0.3.10 Advisory →
  • Fix · GHSA-g8rx-f7m5-7794 @backstage/plugin-scaffolder-backend-module-bitbucket-server (npm) Fixed in 0.2.25 Advisory →

Vendor assessments

Red Hat

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

Not affected: 1 product
  • Red Hat Developer Hub 1

Timeline

  1. 2026-10-07 Threatist record created from CVE-2026-106486
  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-g8rx-f7m5-7794
  7. 2026-10-07 Fix available: npm/@backstage/[email protected], npm/@backstage/[email protected] · GHSA-g8rx-f7m5-7794
  8. 2026-10-07 CVSS score added · GHSA-g8rx-f7m5-7794
  9. 2026-10-07 Weakness changed · GHSA-g8rx-f7m5-7794
  10. 2026-10-07 5 new references · GHSA-g8rx-f7m5-7794
  11. 2026-10-20 Affected versions changed · Red Hat
  12. 2026-10-23 CVSS score added · NVD
  13. 2026-10-23 Priority changed: LOW → MEDIUM
  14. 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-2026-60083 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
  • TI-2026-69074 Race condition in Backstage scaffolder backend task handling CVSS 3.1HIGH 8.5
See all 52 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences