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CVE PROGRAM SOURCE RECORD8.1 High

CVE-2026-106503

Backstage: Scaffolder action input authorization bypass

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Status
Published
Published
Updated
Assigning organization
GitHub_M

Description

Backstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by scaffolder action input authorization bypass. An authenticated user with access to affected Scaffolder templates could bypass configured action restrictions. Depending on integration credentials, this could grant unauthorized access to repositories and related source-control resources. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

backstage backstage

  • < 1.49.6affected
  • >= 1.50.0-next.0, < 1.50.5affected
  • >= 1.51.0-next.0, < 1.54.6affected

@backstage plugin-scaffolder-backend

  • < 3.3.1affected
  • >= 3.4.0, < 3.4.1affected
  • >= 4.0.0, < 4.0.3affected
  • >= 4.0.4, < 4.1.0affected

References