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OpenAdvisories
Medium · 6.5 CVE-2026-106504 EUVD-2026-94069GHSA-4xvq-3m68-h444

Backstage: Sensitive information exposure in scaffolder task logs

Published Oct 6, 2026 · Updated Oct 7, 2026 · Assigned by GitHub_M

Description

Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by sensitive information exposure in scaffolder task logs. An authenticated user who can create and read scaffolder tasks may be able to observe sensitive values in task logs in deployments with restrictive action permissions and affected templates. Exploitation requires a denied action whose input contains such a value. This issue is fixed in version 4.1.0.

Affected products

VendorProductAffectedFixed
backstage backstage < 1.54.6 —
@backstage plugin-scaffolder-backend < 4.1.0 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm @backstage/plugin-scaffolder-backend < 4.1.0 4.1.0 GHSA-4xvq-3m68-h444

References