Disclosure summary
### Impact An authenticated Backstage user who can read another user's Scaffolder task may receive internal execution data. In deployments where that data contains credentials for an external service, this may permit disclosure and unauthorized changes in that external service. ### Patches Patched in `@backstage/plugin-scaffolder-backend` version `4.1.0` ### Workarounds - Configure `scaffolder.task.read` with the `isTaskOwner` condition so users can only read tasks they created. - Restrict affected integrations and workflows to trusted operators until an upgrade is available.
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
GitHub Reviewed Security Advisories · GHSA-g2v8-7jhw-pp8p
Open original source · Updated Oct 07, 2026
Backstage: Sensitive information exposure in Scaffolder
Source severity: CRITICAL / 0
| Ecosystem | Package | Affected range | First patched |
|---|---|---|---|
| npm | @backstage/plugin-scaffolder-backend | < 3.3.1 | 3.3.1 |
| npm | @backstage/plugin-scaffolder-backend | >= 3.4.0, < 3.4.1 | 3.4.1 |
| npm | @backstage/plugin-scaffolder-backend | >= 4.0.0, < 4.0.3 | 4.0.3 |
| npm | @backstage/plugin-scaffolder-backend | >= 4.0.4, < 4.1.0 | 4.1.0 |
Original records & references
- NIST NVD record
- CVE Program record
- github.com — Reviewed advisory
PUBLISHED 2026-10-07T13:59:19-04:00
MODIFIED 2026-10-07T13:59:20-04:00
INGESTED 2026-10-08T12:05:11-04:00