NetSight
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medium6.4

CVE-2026-106462

Backstage's scaffolder credential handling may allow unintended GitHub authentication fallback

Impact

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.

Affected packages

EcosystemPackageAffectedFixed in
npm@backstage/plugin-scaffolder-backend< 4.1.04.1.0
npm@backstage/plugin-scaffolder-backend-module-github< 0.9.130.9.13
npm@backstage/plugin-scaffolder-backend-module-gitlab< 0.11.100.11.10
npm@backstage/plugin-scaffolder-backend-module-azure< 0.2.250.2.25
npm@backstage/plugin-scaffolder-backend-module-bitbucket-cloud< 0.3.100.3.10
npm@backstage/plugin-scaffolder-backend-module-bitbucket-server< 0.2.250.2.25

Affected products

VendorProductAffected versions
LinuxfoundationBackstage\/Plugin-Scaffolder-Backend
before 0.11.10
LinuxfoundationBackstage\/Plugin-Scaffolder-Backend-Module-Azure
before 0.2.25
LinuxfoundationBackstage\/Plugin-Scaffolder-Backend-Module-Bitbucket-Cloud
before 0.3.10
LinuxfoundationBackstage\/Plugin-Scaffolder-Backend-Module-Bitbucket-Server
before 0.2.25
LinuxfoundationBackstage\/Plugin-Scaffolder-Backend-Module-Github
before 0.9.13
LinuxfoundationBackstage\/Plugin-Scaffolder-Backend-Module-Gitlab
before 0.11.10
LinuxfoundationBackstage
before 1.54.6

Weakness classification

CWE-441CWE-863

References