GHSA-4xvq-3m68-h444
Backstage has sensitive information exposure in scaffolder task logs
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @backstage/plugin-scaffolder-backend | < 4.1.0 | 4.1.0 |
Details
As written in the advisory (Markdown source, shown as plain text).
### Impact
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.
### Patches
Patched in `@backstage/plugin-scaffolder-backend` version `4.1.0`
### Workarounds
- Restrict scaffolder task creation and task-log reading to trusted users.
- Avoid placing centrally managed sensitive values in inputs to actions that may be denied until upgrading.
### References
- [Backstage threat model](https://backstage.io/docs/overview/threat-model/)
- [Backstage permissions overview](https://backstage.io/docs/permissions/overview/)
References
External links from the advisory. They lead to third-party sites.
- https://github.com/backstage/backstage/security/advisories/GHSA-4xvq-3m68-h444
- https://nvd.nist.gov/vuln/detail/CVE-2026-106504
- https://github.com/backstage/backstage/commit/3eb3dc59eb0da0deccd532f19eb460bb452c9efb
- https://github.com/backstage/backstage
- https://github.com/backstage/backstage/releases/tag/v1.54.6