[ CVE-2026-106462 · Published 6 Oct 2026 ]
Backstage's scaffolder credential handling may allow unintended GitHub authentication fallback
CVSS 6.4
EPSS <1%Fix available
[ Description ]Official description
Backstage is an open framework for building developer portals. Prior to 1.54.6, scaffolder source-control actions may not consistently enforce intended credential boundaries. An authenticated user could cause an affected action to fall back to broader integration credentials and perform operations with more access than intended. This issue is fixed in 1.54.6 when operators also enable scaffolder.requireScmUserCredentials after upgrading.
[ Fixes ]Fixes and patches
- @backstage/plugin-scaffolder-backend 4.1.0Fixed version · GitHub Advisories · npm package @backstage/plugin-scaffolder-backend: upgrade to 4.1.0 or later (affected < 4.1.0)
- @backstage/plugin-scaffolder-backend-module-github 0.9.13Fixed version · GitHub Advisories · npm package @backstage/plugin-scaffolder-backend-module-github: upgrade to 0.9.13 or later (affected < 0.9.13)
- @backstage/plugin-scaffolder-backend-module-gitlab 0.11.10Fixed version · GitHub Advisories · npm package @backstage/plugin-scaffolder-backend-module-gitlab: upgrade to 0.11.10 or later (affected < 0.11.10)
- @backstage/plugin-scaffolder-backend-module-azure 0.2.25Fixed version · GitHub Advisories · npm package @backstage/plugin-scaffolder-backend-module-azure: upgrade to 0.2.25 or later (affected < 0.2.25)
- @backstage/plugin-scaffolder-backend-module-bitbucket-cloud 0.3.10Fixed version · GitHub Advisories · npm package @backstage/plugin-scaffolder-backend-module-bitbucket-cloud: upgrade to 0.3.10 or later (affected < 0.3.10)
- @backstage/plugin-scaffolder-backend-module-bitbucket-server 0.2.25Fixed version · GitHub Advisories · npm package @backstage/plugin-scaffolder-backend-module-bitbucket-server: upgrade to 0.2.25 or later (affected < 0.2.25)
- Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
- Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
[ Packages ]Affected open-source packages
- @backstage/plugin-scaffolder-backend npmAffected < 4.1.0 · fixed in 4.1.0 · GHSA-29gx-h2m3-xw44
- @backstage/plugin-scaffolder-backend-module-github npmAffected < 0.9.13 · fixed in 0.9.13 · GHSA-29gx-h2m3-xw44
- @backstage/plugin-scaffolder-backend-module-gitlab npmAffected < 0.11.10 · fixed in 0.11.10 · GHSA-29gx-h2m3-xw44
- @backstage/plugin-scaffolder-backend-module-azure npmAffected < 0.2.25 · fixed in 0.2.25 · GHSA-29gx-h2m3-xw44
- @backstage/plugin-scaffolder-backend-module-bitbucket-cloud npmAffected < 0.3.10 · fixed in 0.3.10 · GHSA-29gx-h2m3-xw44
- @backstage/plugin-scaffolder-backend-module-bitbucket-server npmAffected < 0.2.25 · fixed in 0.2.25 · GHSA-29gx-h2m3-xw44