[ CVE-2026-106504 · Published 6 Oct 2026 ]
Backstage has sensitive information exposure in scaffolder task logs
CVSS 6.5
EPSS <1%Fix available
[ Description ]Official 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.
[ 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)
- 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-4xvq-3m68-h444